File: runtime_enabled_features.json5

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{
  // See third_party/blink/renderer/platform/RuntimeEnabledFeatures.md
  //
  // This list is used to generate runtime_enabled_features.h/cc which contains
  // a class that stores static enablers for all experimental features.

  parameters: {
    // Each feature can be assigned a "status". The "status" can be either
    // one of the values in the |valid_values| list or a dictionary of
    // the platforms listed in |valid_keys| to |valid_values|.
    // Use "default" as the key if you want to specify the status of
    // the platforms other than the ones declared in the dictionary.
    // ** Omitting "default" means the feature is not enabled on
    // the platforms not listed in the status dictionary
    //
    // Definition of each status:
    // * status=stable: Enable this in all Blink configurations. We are
    //   committed to these APIs indefinitely.
    // * status=experimental: In-progress features, Web Developers might play
    //   with, but are not on by default in stable. These features may be
    //   turned on using the "Experimental Web Platform features" flag in
    //   chrome://flags/#enable-experimental-web-platform-features.
    // * status=test: Enabled in ContentShell for testing, otherwise off.
    // Features without a status are not enabled anywhere by default.
    //
    // Example of the dictionary value use:
    // {
    //   name: "ExampleFeature",
    //   status: {"Android": "stable", "Win": "experimental"},
    // }
    // "ExampleFeature" will be stable on Android/WebView, experimental
    // on Windows and not enabled on any other platform.
    //
    // Note that the Android status key implies Chrome for Android and WebView.
    //
    // "stable" features listed here should be rare, as anything which we've
    // shipped stable can have its runtime flag removed soon after.
    status: {
      valid_values: ["stable", "experimental", "test"],
      valid_keys: ["Android", "Win", "ChromeOS", "Mac", "Linux", "iOS"]
    },

    // "implied_by" or "depends_on" specifies relationship to other features:
    // * implied_by: ["feature1","feature2",...]
    //   The feature is automatically enabled if any implied_by features is
    //   enabled. To effectively disable the feature, you must disable the
    //   feature and all the implied_by features.
    // * depends_on: ["feature1","feature2",...]
    //   The feature can be enabled only if all depends_on features are enabled.
    // Only one of "implied_by" and "depends_on" can be specified.
    implied_by: {
      default: [],
      valid_type: "list",
    },

    // *DO NOT* specify features that depend on origin trial features.
    // It is NOT supported. As a workaround, you can either specify the same
    // |origin_trial_feature_name| for the feature or add the OT feature to
    // the |implied_by| list.
    // TODO(https://crbug.com/954679): Add support for origin trial features in 'depends_on' list
    depends_on: {
      default: [],
      valid_type: "list",
    },

    // origin_trial_feature_name: "FEATURE_NAME" is used to integrate the
    // feature with the Origin Trials framework. The framework allows the
    // feature to be enabled at runtime on a per-page basis through a signed
    // token for the corresponding feature name. Declaring the
    // origin_trial_feature_name will modify the generation of the static
    // methods in runtime_enabled_features.h/cpp -- the no-parameter version
    // will not be generated, so all callers have to use the version that takes
    // a const FeatureContext* argument.
    origin_trial_feature_name: {
    },
    // origin_trial_os specifies the platforms where the trial is available.
    // The default is empty, meaning all platforms.
    origin_trial_os: {
      default: [],
      valid_type: "list",
    },
    // origin_trial_type specifies the unique type of the trial, when not the
    // usual trial for a new experimental feature.
    origin_trial_type: {
      default: "",
      valid_type: "str",
      valid_values: ["deprecation", "intervention", ""],
    },
    // origin_trial_allows_insecure specifies whether the trial can be enabled
    // in an insecure context, with default being false. This can only be set
    // to true for a "deprecation" type trial.
    origin_trial_allows_insecure: {
      valid_type: "bool",
    },

    // origin_trial_allows_third_party specifies whether the trial can be enabled
    // from third party origins, with default being false.
    origin_trial_allows_third_party: {
      valid_type: "bool",
    },

    // settable_from_internals specifies whether a feature can be set from
    // internals.runtimeFlags, with the default being false.
    settable_from_internals: {
      valid_type: "bool",
    },

    // public specifies whether a feature can be accessed via
    // third_party/blink/public/platform/web_runtime_features.h with dedicated
    // methods. The default is false. This should be rare because
    // WebRuntimeFeatures::EnableFeatureFromString() works in most cases.
    public: {
      valid_type: "bool",
    },

    // Feature policy IDL extended attribute (see crrev.com/2247923004).
    feature_policy: {
    },

    // The string name of a base::Feature. The C++ variable name in
    // blink::features is built with this string by prepending 'k'.
    // As long as this field isn't "none", a base::Feature is automatically
    // generated in features_generated.{h,cc}.  By default the "name" field
    // is used for the feature name, but can be overridden here.
    //
    // The default value of the base::Feature instance is:
    //  base::FEATURE_ENABLED_BY_DEFAULT if 'status' field is 'stable", and
    //  base::FEATURE_DISABLED_BY_DEFAULT otherwise.
    // It can be overridden by 'base_feature_status' field.
    //
    // If the flag should be associated with a feature not in blink::features,
    // we need to specify `base_feature: "none"` and map the features in
    // content/child/runtime_features.cc. `base_feature: "none"` is strongly
    // discouraged if the feature doesn't have an associated base feature
    // because the feature would lack a killswitch controllable via finch.
    base_feature: {
      valid_type: "str",
      default: "",
    },

    // Specify the default value of the base::Feature instance. This field
    // works only if base_feature is not "none".
    // If the field is missing or "", the default value depends on the 'status'
    // field.  See the comment above.
    // "disabled" sets base::FEATURE_DISABLED_BY_DEFAULT, and "enabled" sets
    // base::FEATURE_ENABLED_BY_DEFAULT.
    base_feature_status: {
      valid_type: "str",
      valid_values: ["", "disabled", "enabled"],
      default: "",
    },

    // Specify how the flag value is updated from the base::Feature value. This
    // field is used only if base_feature is not empty.
    //
    // * "enabled_or_overridden"
    // - If the base::Feature status is overridden to the enabled or disabled
    //   state by field trial or command line, set Blink feature to the state
    //   of the base::Feature.  Note: "Override to Default" doesn't affect the
    //   Blink feature.
    // - Otherwise if the base::Feature is enabled, enable the Blink feature.
    // - Otherwise no change.
    //
    // * "overridden"
    //   Enables the Blink feature when the base::Feature status is overridden
    //   to the enabled or disabled state by field trial or command line.
    //   Otherwise no change. Its difference from "enabled_or_overridden" is
    //   that the Blink feature isn't affected by the default state of the
    //   base::Feature.  Note: "Override to Default" deosn't affect the Blink
    //   feature.
    //
    //   This is useful for Blink origin trial features especially those
    //   implemented in both Chromium and Blink. As origin trial only controls
    //   the Blink features, for now we require the base::Feature to be enabled
    //   by default, but we don't want the default enabled status affect the
    //   Blink feature. See also https://crbug.com/1048656#c10.
    //   This can also be used for features that are enabled by default in
    //   Chromium but not in Blink on all platforms and we want to use the Blink
    //   status. However, we would prefer consistent Chromium and Blink status
    //   to this.
    copied_from_base_feature_if: {
      valid_type: "str",
      valid_values: ["enabled_or_overridden", "overridden"],
      default: "enabled_or_overridden",
    },

    // browser_process_read_access indicates the runtime feature state should be
    // readable in the browserprocess via RuntimeFeatureStateReadContext.
    // TODO(crbug.com/1377000): this feature does not support origin trial
    // tokens provided in HTTP headers. Any tokens provided via HTTP header will
    // be dropped.
    browser_process_read_access: {
      default: false,
      value_type: "bool",
    },

    // browser_process_read_write_access indicates the runtime feature state
    // should be writable in the browserprocess via RuntimeFeatureStateContext.
    // TODO(crbug.com/1377000): this feature does not support origin trial
    // tokens provided in HTTP headers. Any tokens provided via HTTP header will
    // be dropped.
    browser_process_read_write_access: {
      default: false,
      value_type: "bool",
    },

    // is_protected_feature indicates whether the feature enablement state should
    // be tracked using a base::Protected<bool> value or just a regular bool
    // value.
    is_protected_feature: {
      default: false,
      value_type: "bool",
    }
  },

  data: [
    {
      name: "Accelerated2dCanvas",
      settable_from_internals: true,
      status: "stable",
    },
    {
      name: "AcceleratedSmallCanvases",
      status: "stable",
    },
    {
      name: "AccessibilityAriaVirtualContent",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "AccessibilityCustomElementRoleNone",
      public: true,
      status: "test",
      base_feature: "none",
    },
    {
      name: "AccessibilityExposeDisplayNone",
      status: "test",
    },
    {
      // If the author did not define aria-actions, surface button and link
      // children inside option and menuitem elements as implicit actions.
      name: "AccessibilityImplicitActions",
      status: "experimental",
    },
    {
      // Use a minimum role of group on elements that are keyboard-focusable.
      // See https://w3c.github.io/html-aam/#minimum-role.
      name: "AccessibilityMinRoleTabbable",
    },
    {
      name: "AccessibilityOSLevelBoldText",
      status: "experimental",
      public: true,
    },
    {
      // Enforce no accessible name on objects that have a role where names are
      // prohibited (listed in https://w3c.github.io/aria/#namefromprohibited):
      // log a friendly error in the developer console, and trigger a DCHECK().
      // The incorrect markup situation will be repaired, and the name will
      // be exposed as a description instead.
      // TODO(crbug.com/350528330,
      // https://github.com/web-platform-tests/interop-accessibility/issues/133,
      // https://github.com/w3c/accname/issues/240,
      // https://github.com/w3c/accname/issues/241): If community feedback is
      // positive, and WPT + accname testable statements are updated to allow
      // this, then add status: test.
      name: "AccessibilityProhibitedNames",
    },
    {
      name: "AccessibilitySerializationSizeMetrics",
      status: "experimental",
    },
    {
      name: "AccessibilityUseAXPositionForDocumentMarkers",
      base_feature: "none",
      public: true,
    },
    {
      name: "AddressSpace",
      status: "experimental",
      implied_by: ["CorsRFC1918"],
    },
    {
      // Interest Group JS API/runtimeflag.
      name: "AdInterestGroupAPI",
      status: "stable",
      origin_trial_feature_name: "AdInterestGroupAPI",
      implied_by: ["Fledge", "Parakeet"],
      public: true,
    },
    // Fix for crbug.com/403358869
    {
      name: "AdjustDOMOffsetToLayoutOffsetForSecureText",
      status: "stable",
    },
    // Adjust the end of the next paragraph if the end position for the
    // paragraph is updated while moving the paragraph. See
    // https://crbug.com/329121649
    {
      name: "AdjustEndOfNextParagraphIfMovedParagraphIsUpdated",
      status: "stable",
    },
    {
      name: "AdTagging",
      public: true,
      status: "test",
      base_feature: "none",
    },
    {
      name: "AIPageContentPaidContentAnnotation",
      status: "stable"
    },
    {
      name: "AIPromptAPI",
      public: true,
      status: {
        "Win": "experimental",
        "Mac": "experimental",
        "Linux": "experimental",
        "default": "",
      },
      origin_trial_feature_name: "AIPromptAPIMultimodalInput",
      origin_trial_os: ["win", "mac", "linux"],
      origin_trial_allows_third_party: true,
      implied_by: ["AIPromptAPIMultimodalInput"],
    },
    {
      // Extension access to "AIPromptAPI".
      name: "AIPromptAPIForExtension",
      public: true,
      status: {
        "Win": "stable",
        "Mac": "stable",
        "Linux": "stable",
        "default": "",
      },
    },
    {
      name: "AIPromptAPIForWorkers",
      public: true,
    },
    {
      name: "AIPromptAPIMultimodalInput",
      status: {
        "Win": "experimental",
        "Mac": "experimental",
        "Linux": "experimental",
        "default": "",
      },
      origin_trial_feature_name: "AIPromptAPIMultimodalInput",
      origin_trial_os: ["win", "mac", "linux"],
      origin_trial_allows_third_party: true,
      base_feature_status: "enabled",
      copied_from_base_feature_if: "overridden",
    },
    {
      // Gates access to the responseConstraint enhancement for "AIPromptAPI".
      // This feature alone does not expose any "AIPromptAPI" feature access.
      name: "AIPromptAPIStructuredOutput",
      status: "stable",
    },
    {
      name: "AIProofreadingAPI",
      status: "test",
    },
    {
      name: "AIRewriterAPI",
      status: {
        "Win": "experimental",
        "Mac": "experimental",
        "Linux": "experimental",
        "default": "",
      },
      origin_trial_feature_name: "AIRewriterAPI",
      origin_trial_os: ["win", "mac", "linux"],
      origin_trial_allows_third_party: true,
      base_feature_status: "enabled",
      copied_from_base_feature_if: "overridden",
    },
    {
      name: "AIRewriterAPIForWorkers",
      public: true,
    },
    {
      name: "AISummarizationAPI",
      status: {
        "Win": "stable",
        "Mac": "stable",
        "Linux": "stable",
        "default": "",
      },
    },
    {
      name: "AISummarizationAPIForWorkers",
      public: true,
    },
    {
      name: "AIWriterAPI",
      status: {
        "Win": "experimental",
        "Mac": "experimental",
        "Linux": "experimental",
        "default": "",
      },
      origin_trial_feature_name: "AIWriterAPI",
      origin_trial_os: ["win", "mac", "linux"],
      origin_trial_allows_third_party: true,
      base_feature_status: "enabled",
      copied_from_base_feature_if: "overridden",
    },
    {
      name: "AIWriterAPIForWorkers",
      public: true,
    },
    {
      name: "AlignZoomToCenter",
      status: "stable",
    },
    {
      name: "AllowContentInitiatedDataUrlNavigations",
      base_feature: "none",
    },
    // Fix for https://crbug.com/41238177.
    {
      name: "AllowCopyingEmptyLastTableCell",
      status: "stable",
    },
    {
      name: "AllowPreloadingWithCSPMetaTag",
      status: "experimental",
    },
    {
      name: "AllowSameSiteNoneCookiesInSandbox",
      base_feature: "none",

      // No status because this blink runtime feature doesn't work by itself.
      // It's controlled by the corresponding Chromium feature,
      // net::features::kAllowSameSiteNoneCookiesInSandbox, which needs to be
      // enabled to make the whole feature work.
    },
    {
      // https://crbug.com/40681200
      name: "AllowSkippingEditingBoundaryToMergeEnd",
      status: "stable",
    },
    {
      name: "AllowSvgUseToReferenceExternalDocumentRoot",
      status: "stable",
    },
    {
      name: "AllowSyntheticTimingForCanvasCapture",
      base_feature: "none",
      status: {
        "Mac": "stable",
        "default": ""
      }
    },
    {
      name: "AllowURNsInIframes",
      base_feature: "none",
    },
    {
      // Kill switch for https://crbug.com/415834974 which changes anchor
      // positioning adjustments to occur even in cases where there is no
      // scrollable overflow.
      name: "AnchorPositionAdjustmentWithoutOverflow",
      status: "stable",
    },
    {
      name: "AndroidDownloadableFontsMatching",
      base_feature: "none",
      public: true,
    },
    {
      // https://chromestatus.com/feature/5083257285378048
      name: "AnimationProgressAPI",
      status: "stable",
    },
    {
      // https://drafts.csswg.org/web-animations-2/#triggers
      name: "AnimationTrigger",
      status: "experimental",
    },
    {
      name: "AnimationWorklet",
    },
    {
      name: "AnonymousIframe",
      status: "stable",
    },
    {
      name: "AOMAriaRelationshipProperties",
      public: true,
      status: "stable",
    },
    {
      name: "AOMAriaRelationshipPropertiesAriaOwns",
      public: true,
      status: "experimental",
      depends_on: ["AOMAriaRelationshipProperties"],
    },
    {
      name: "AppTitle",
      status: "experimental",
      origin_trial_feature_name: "AppTitle",
      origin_trial_os: ["win", "mac", "linux", "chromeos"],
      base_feature: "WebAppEnableAppTitle",
    },
    {
      name: "AriaActions",
      status: "experimental",
    },
    {
      name: "AriaNotify",
      status: {"Android": "experimental", "Win": "experimental", "Mac": "experimental", "Linux": "experimental"},
      implied_by: ["AriaNotifyV2"],
    },
    {
      name: "AriaNotifyV2",
      status: {"Android": "test", "Win": "test", "Mac": "test", "Linux": "test"},
    },
    {
      name: "AriaRowColIndexText",
      status: "stable",
    },
    {
      // When enabled, perform async IPCs from CookieJar::SetCookie to the
      // network service.
      name: "AsyncSetCookie",
    },
    {
      name: "AttributionReporting",
      status: "stable",
      base_feature: "none",
      public: true,
    },
    {
      name: "AudioContextInterruptedState",
      status: "stable",
    },
    {
      name: "AudioContextOnError",
      status: "stable",
    },
    {
      // AudioContext.playoutStats interface.
      // https://chromestatus.com/feature/5172818344148992
      name: "AudioContextPlayoutStats",
      origin_trial_feature_name: "AudioContextPlayoutStats",
      status: "experimental",
    },
    {
      name: "AudioContextSetSinkId",
      status: "stable",
    },
    {
      name: "AudioOutputDevices",
      // Android support for switching audio output devices is not stable
      status: {"Android": "", "default": "stable"},
      public: true,
      base_feature: "none"
    },
    {
      name: "AudioVideoTracks",
      status: "experimental",
    },
    {
      name: "AutoDarkMode",
      base_feature: "none",
      origin_trial_feature_name: "AutoDarkMode",
    },
    {
      name: "AutomationControlled",
      base_feature: "none",
      public: true,
      settable_from_internals: true,
    },
    {
      name: "AutoPictureInPictureVideoHeuristics",
      status: "experimental",
    },
    { // If the start and end positions are the same in MoveParagraph,
      // there is no need to collapse the whitespace between them.
      // https://crbug.com/406053617
      name: "AvoidNormalizingVisiblePositionsWhenStartEqualsEnd",
      status: "stable",
    },
    // When enabled, clicking on canvas element will not update the selection.
    // See crbug.com/40130450.
    {
      name: "AvoidSelectionChangeOnCanvasClick",
      status: "stable"
    },
    // When enabled, enforces new interoperable semantics for 3D transforms.
    // See crbug.com/1008483.
    {
      name: "BackfaceVisibilityInterop",
    },
    {
      name: "BackForwardCache",
      base_feature: "none",
      public: true,
    },
    {
      name: "BackForwardCacheExperimentHTTPHeader",
      origin_trial_feature_name: "BackForwardCacheExperimentHTTPHeader",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "BackForwardCacheNotRestoredReasons",
      status: "stable",
      origin_trial_feature_name: "BackForwardCacheNotRestoredReasons",
      base_feature: "BackForwardCacheSendNotRestoredReasons",
      base_feature_status: "enabled",
      copied_from_base_feature_if: "overridden",
    },
    {
      name: "BackForwardCacheRestorationPerformanceEntry",
      status: "experimental",
    },
    {
      name: "BackForwardCacheUpdateNotRestoredReasonsName",
      status: "stable",
    },
    {
      // Used to enable Blink side of features flags for Default Nav Transition.
      name: "BackForwardTransitions",
    },
    {
      name: "BackgroundFetch",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    // A developer opt-out for background page freezing.
    {
      name: "BackgroundPageFreezeOptOut",
      base_feature: "none",
      origin_trial_feature_name: "BackgroundPageFreezeOptOut",
      origin_trial_type: "deprecation",
    },
    {
      name: "BarcodeDetector",
      status: {
        // Built-in barcode detection APIs are only available from some
        // platforms. See //services/shape_detection.
        "Android": "stable",
        "ChromeOS": "stable",
        "Mac": "stable",
        "default": "test",
      },
    },
    {
      name: "BidiCaretAffinity",
    },
    {
      name: "BlinkExtensionChromeOS",
      browser_process_read_write_access: true,
    },
    {
      name: "BlinkExtensionChromeOSKiosk",
      depends_on: ["BlinkExtensionChromeOS"],
      browser_process_read_write_access: true,
    },
    {
      name: "BlinkExtensionWebView",
      public: true,
    },
    {
      name: "BlinkExtensionWebViewMediaIntegrity",
      public: true,
    },
    {
      name: "BlinkLifecycleScriptForbidden",
    },
    {
      name: "BlinkRuntimeCallStats",
    },
    {
      name: "BlockingFocusWithoutUserActivation",
      status: "experimental",
    },
    // crbug.com/1147998: Mouse and Pointer boundary event dispatch (i.e. dispatch
    // of enter, leave, over, out events) tracks DOM node removal to fix event
    // pairing on ancestor nodes.
    {
      name: "BoundaryEventDispatchTracksNodeRemoval",
      public: true,
      status: "experimental",
    },
    {
      name: "BrowserInitiatedAutomaticPictureInPicture",
      public: true,
      status: "experimental",
    },
    {
      name: "BrowserVerifiedUserActivationKeyboard",
      base_feature: "none",
      public: true,
    },
    {
      name: "BrowserVerifiedUserActivationMouse",
      base_feature: "none",
      public: true,
    },
    {
      name: "BufferedBytesConsumerLimitSize",
      status: "stable",
    },
    {
      name: "BuiltInAIAPI",
      status: "experimental",
      base_feature_status: "enabled",
      // An OT feature name is required to satisfy `implied_by` build checks.
      // The feature reuses AIPromptAPIMultimodalInput, but any origin trial
      // features in the `implied_by` list will enable this feature as well.
      origin_trial_feature_name: "AIPromptAPIMultimodalInput",
      copied_from_base_feature_if: "overridden",
      implied_by: [
        "AIPromptAPI",
        "AIPromptAPIMultimodalInput",
        "AIRewriterAPI",
        "AISummarizationAPI",
        "AIWriterAPI",
        "LanguageDetectionAPI",
        "TranslationAPI",
        "AIProofreadingAPI",
      ]
    },
    {
      // Bypasses the enforcement of the Page Embedded Permission Control
      // security checks. This flag is disabled by default and should only be
      // enabled in automated tests in order to allow them to avoid needing to
      // wait until the PEPC is validated and also to use JS-initiated clicks.
      name: "BypassPepcSecurityForTesting",
    },
    {
      name: "CacheStorageCodeCacheHint",
      origin_trial_feature_name: "CacheStorageCodeCacheHint",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CallExitNodeWithoutLayoutObject",
      status: "stable",
    },
    {
      name: "Canvas2dCanvasFilter",
      status: "experimental",
    },
    {
      name: "Canvas2dGPUTransfer",
      status: "experimental",
    },
    {
      name: "Canvas2dImageChromium",
      base_feature: "none",
      public: true,
    },
    {
      name: "Canvas2dLayers",
    },
    {
      name: "Canvas2dLayersWithOptions",
      status: "experimental",
      depends_on: ["Canvas2dLayers"],
    },
    {
      name: "Canvas2dMesh",
      origin_trial_feature_name: "Canvas2dMesh",
      origin_trial_allows_third_party: true,
      status: "test",
    },
    {
      // https://github.com/WICG/html-in-canvas/blob/main/README.md
      name: "CanvasDrawElement",
      status: "test",
    },
    {
      name: "CanvasFloatingPoint",
      status: "stable",
    },
    {
      // https://crbug.com/394052224
      name: "CanvasGradientCSSColor4",
      status: "experimental",
    },
    {
      name: "CanvasHDR",
      status: "experimental",
    },
    {
      // No status because this blink runtime feature doesn't work by itself.
      // It's controlled by the corresponding Chromium feature,
      // fingerprinting_protection_interventions::features::kCanvasNoise through
      // modified_runtime_features and setting its status in the browser
      // process.
      name: "CanvasInterventions",
      browser_process_read_write_access: true,
      base_feature: "none",
    },
    {
      // https://chromestatus.com/feature/5066778773028864
      name: "CanvasTextLang",
      status: "stable",
    },
    {
      // crbug.com/389726691.
      name: "CanvasTextNg",
      origin_trial_feature_name: "CanvasTextNg",
      status: "experimental",
    },
    {
      // Kill switch for https://crbug.com/330506337.
      name: "CanvasUsesArcPaintOp",
      status: "stable",
    },
    {
      name: "CapabilityDelegationDisplayCaptureRequest",
      status: "experimental",
    },
    {
      name: "CaptureController",
      status: {"Android": "", "default": "stable"},
    },
    {
      // TODO(crbug.com/1444712): Before enabling that flag by default,
      // make sure MouseCursorOverlayController does not transmit mouse
      // events to a CaptureController that don't have any
      // capturedmousechange listener attached to it.
      // See https://github.com/screen-share/mouse-events/issues/14
      name: "CapturedMouseEvents",
      "depends_on": ["CaptureController"],
      status: {"Android": "", "default": "test"},
    },
    {
      name: "CapturedSurfaceControl",
      status: {"Android": "", "default": "stable"}
    },
    {
      name: "CapturedSurfaceResolution",
      status: { "Win": "stable", "Mac": "stable", "ChromeOS": "stable", "default": ""},
    },
    {
      name: "CaptureHandle",
      depends_on: ["GetDisplayMedia"],
      status: {"Android": "", "default": "stable"},
    },
    {
      // https://www.w3.org/TR/cssom-view-1/#dom-document-caretpositionfrompoint
      name: "CaretPositionFromPoint",
      status: "stable",
    },
    {
      // Changes the caret's affinity to upstream, preventing spaces
      // from appearing in the previous line when typing at the start
      // of a wrapped line. See https://crbug.com/40677155
      name: "CaretWithTextAffinityUpstream",
      status: "stable",
    },
    {
      name: "CascadedAfterChangeStyle",
      status: "stable",
    },
    {
      // Kill switch for changes to RenderFrameMetadataObserverImpl in connection with Engagement
      // Signals. See https://crrev.com/c/4544201 and https://crbug.com/1458640.
      name: "CCTNewRFMPushBehavior",
      base_feature_status: "enabled",
    },
    {
      // If focus is not at canonical position then spellcheck should be deactivated.
      // crbug.com/396485529
      name: "CheckForCanonicalPositionInIdleSpellCheck",
      status: "stable",
    },
    {
      name: "CheckVisibilityExtraProperties",
      status: "stable",
    },
    // This flag shifts the timing of clearing the popover invoker so that it
    // happens after the `beforetoggle` event is fired. This is something of a
    // bug fix: see the spec discussion at
    // https://github.com/whatwg/html/issues/11246#issuecomment-2860876897.
    // This is enabled by default, and is a kill switch. It shipped in M138,
    // and can be removed in M140.
    {
      name: "ClearPopoverInvokerAfterBeforeToggle",
      status: "stable",
    },
    {
      // Allows top-level sites to restrict collection of high-entropy UA client
      // hints (from 3Ps, or itself) via the getHighEntropyValues API.
      // crbug.com/385161047
      name: "ClientHintUAHighEntropyValuesPermissionPolicy",
      status: "test",
    },
    {
      // Enables clipboardchange event API for listening for changes to the
      // system clipboard
      // https://chromestatus.com/feature/5085102657503232
      name: "ClipboardChangeEvent",
      base_feature: "none",
    },
    {
      // Enables the API for getting a unique token of the system clipboard's
      // current state.
      // https://chromestatus.com/feature/5124993439236096
      name: "ClipboardContentsId",
      status: "test",
    },
    // This ensures that clipboard event fires on a target node which is
    // focused in case no visible selection is present.
    // crbug.com/40735783
    {
      name: "ClipboardEventTargetCanBeFocusedElement",
      status: "stable",
    },
    {
      // Support ClipboardItemData of Promise<DOMString> type according to spec
      // https://w3c.github.io/clipboard-apis/#typedefdef-clipboarditemdata
      name: "ClipboardItemWithDOMStringSupport",
      status: "stable",
    },
    {
      // Enables the ability to reset the clipboard snapshot when clipboard write
      // operations are performed. This feature ensures that stale clipboard data
      // is cleared and a fresh snapshot is created when necessary.
      // See crbug.com/388081043
      name: "ClipboardSnapshotResetOnWrite",
      status: "stable",
    },
    {
      name: "ClipElementVisibleBoundsInLocalRoot",
      status: "stable",
    },
    {
      name: "ClipPathNestedRasterOptimization",
      status: "stable",
    },
    {
      // Avoid queuing a task to fire a selectionchange event when there is already a task scheduled
      // to do that for the target according to the new spec:
      // https://w3c.github.io/selection-api/#scheduling-selectionhange-event
      name: "CoalesceSelectionchangeEvent",
      status: "stable",
    },
    {
      name: "CoepReflection",
      status: "test",
    },
    {
      name: "CollapseZeroWidthSpaceWhenReuseItem",
      status: "stable",
    },
    {
      name: "CompositeBGColorAnimation",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "CompositeBoxShadowAnimation",
    },
    {
      name: "CompositeClipPathAnimation",
      status: "experimental",
      public: true,
    },
    {
      name: "CompositedAnimationsCancelledAsynchronously",
      status: "stable"
    },
    {
      name: "CompositedSelectionUpdate",
      public: true,
      status: {"Android": "stable"},
      base_feature: "none",
    },
    {
      name: "CompositingDecisionAtAnimationPhaseBoundaries"
    },
    {
      name: "CompositionForegroundMarkers",
      status: {
        "Android": "stable",
        "default": "",
      }
    },
    {
      name: "CompressionDictionaryTransport",
      base_feature: "none",
      public: true,
    },
    {
      name: "CompressionDictionaryTransportBackend",
      base_feature: "none",
      public: true,
    },
    {
      name: "ComputedAccessibilityInfo",
      status: "experimental",
    },
    {
      name: "ComputeInsertionPositionBasedOnAnchorType",
      status: "stable",
    },
    {
      name: "ComputePressure",
      status: {
        "Android": "",
        "default": "stable",
      }
    },
    {
      name: "ComputePressureOwnContributionEstimate",
      status: {
        "Android": "",
        "default": "experimental",
      }
    },
    {
      name: "ConsiderFullChildNodeContentForListify",
      status: "stable",
    },
    {
      name: "ContactsManager",
      status:  {"Android": "stable", "default": "test"},
    },
    {
      name: "ContactsManagerExtraProperties",
      status:  {"Android": "stable", "default": "test"},
    },
    {
      name: "ContainerTiming",
      status: "experimental",
    },
    {
      name: "ContainerTypeNoLayoutContainment",
      status: "stable",
    },
    {
      name: "ContentIndex",
      status:  {"Android": "stable", "default": "experimental"},
    },
    {
      name: "ContextMenu",
      status: "experimental",
    },
    {
      name: "ContinueEventTimingRecordingWhenBufferIsFull",
      status: "stable",
    },
    {
      // Enable support for Controlled Frame, providing the Controlled
      // Frame tag to IWA apps and other contexts. See
      // https://github.com/WICG/controlled-frame/blob/main/README.md for more
      // info.
      name: "ControlledFrame",
      public: true,
      status: "experimental",
      base_feature_status: "disabled",
    },
    {
      name: "CookieDeprecationFacilitatedTesting",
      base_feature: "none",
    },
    {
      name: "CoopRestrictProperties",
      origin_trial_feature_name: "CoopRestrictProperties",
      base_feature: "none",
    },
    {
      // Corrects the handling of <form> elements nested within <template> tags
      // in HTML parsing. See https://crbug.com/352896478 for details.
      name: "CorrectTemplateFormParsing",
      status: "experimental"
    },
    {
      name: "CorsRFC1918",
    },
    {
      // Allow WebAuthn relying parties to report information about existing
      // credentials back to credential storage providers.
      // Enabled by default on M132. Remove flag on or after M135.
      name: "CredentialManagerReport",
      status: "stable",
    },
    {
      // When enabled, allowlisting script urls and scripts used in eval via
      // hashes will be supported in script-src. Controlled by the
      // network::features::kCSPScriptSrcHashesInV1 flag.
      // See crbug.com/392657736 for details.
      name: "CSPHashesV1",
      base_feature: "none",
    },
    {
      name: "CSPReportHash",
      status: "stable",
    },
    {
      // The AccentColor And AccentColorText CSS system color keywords
      name: "CSSAccentColorKeyword",
      status: "experimental",
    },
    {
      // CSS attr() function that accepts not only string types
      // and can be used in all properties.
      // https://drafts.csswg.org/css-values-5/#attr-notation
      name: "CSSAdvancedAttrFunction",
      status: "stable",
    },
    {
      // Enables alignment properties for block and inline out-of-flow elements.
      name: "CSSAlignBlockAndInlineOutOfFlows",
      status: "stable",
    },
    {
      // Allows using counter() and counters() in alt text (after / in content property).
      name: "CSSAltCounter",
      status: "experimental",
    },
    {
      // Remember the scroll offset of the default anchor when initially
      // displaying an anchor-positioned element, and when it switches position
      // options (`position-try-fallbacks`), also known as an anchor
      // recalculation point.
      //
      // https://drafts.csswg.org/css-anchor-position-1/#scroll
      //
      // This remembered scroll offset may affect the sizing of an
      // anchor-positioned element, if it is tethered to the default anchor at
      // one edge, and to the original containing block at the other edge.
      // This feature was shipped in M135, and the flag can be cleaned up in
      // M137, assuming no issues.
      name: "CSSAnchorRememberedScrollOffset",
      status: "stable",
    },
    {
      // Support for the anchor-scope property.
      // https://drafts.csswg.org/css-anchor-position-1/#anchor-scope
      name: "CSSAnchorScope",
      status: "stable",
    },
    {
      // Let transforms affect anchor() and anchor-size() functions.
      name: "CSSAnchorWithTransforms",
      status: "experimental",
    },
    {
      // Whether <image> values are allowed as counter style <symbol>
      name: "CSSAtRuleCounterStyleImageSymbols",
    },
    {
      // https://drafts.csswg.org/css-counter-styles/#counter-style-speak-as
      name: "CSSAtRuleCounterStyleSpeakAsDescriptor",
      status: "test",
    },
    {
      // Replaces `string` type in CSS attr() function syntax with `raw-string`.
      // https://github.com/w3c/csswg-drafts/issues/11645#issuecomment-2701601350
      name: "CSSAttrRawString",
      status: "stable",
    },
    {
      // https://chromestatus.com/feature/5125388091260928
      name: "CSSBackgroundClipUnprefix",
      status: "stable",
    },
    // https://chromestatus.com/feature/5459864205393920
    {
      // https://chromestatus.com/feature/5125388091260928
      name: "CSSBorderShape",
      status: "experimental",
    },
    {
      // Support CSS Values Level 4 calc simplification and serialization
      // as specified in the specs below.
      // https://drafts.csswg.org/css-values-4/#calc-simplification
      // https://drafts.csswg.org/css-values-4/#calc-serialize
      name: "CSSCalcSimplificationAndSerialization",
    },
    {
      // https://chromestatus.com/feature/5082469066604544
      name: "CSSCaretAnimation",
      status: "experimental",
    },
    {
      // Need a feature entry
      name: "CSSCaretShape",
      status: "test",
    },
    {
      // Support case-sensitive attribute selector modifier
      // https://drafts.csswg.org/selectors-4/#attribute-case
      name: "CSSCaseSensitiveSelector",
      status: "test",
    },
    {
      // In the cases where it is impossible or impractical to determine the
      // measure of the “0” glyph, it must be assumed to be 0.5em wide by 1em
      // tall. Thus, the ch unit falls back to 0.5em in the general case, and to
      // 1em when it would be typeset upright (i.e. writing-mode is vertical-rl or
      // vertical-lr and text-orientation is upright).
      // https://drafts.csswg.org/css-values-4/#ch
      // See crbug.com/416145497 for more details.
      name: "CSSChUnitSpecCompliantFallback",
      status: "stable",
    },
    {
      name: "CSSColorContrast",
      status: "experimental",
    },
    {
      name: "CSSColorTypedOM",
      status: "experimental",
    },
    {
      name: "CSSComputedStyleFullPseudoElementParser",
      status: "stable",
    },
    // https://drafts.csswg.org/css-values-5/#progress
    // container-progress()
    {
      name: "CSSContainerProgressNotation",
      status: "experimental",
    },
    {
      // https://github.com/w3c/csswg-drafts/issues/8376#issuecomment-2751161553
      name: "CSSContainerStyleQueriesRange",
      status: "test",
    },
    {
      // https://drafts.csswg.org/css-borders-4/#corner-shaping
      name: "CSSCornerShape",
      status: "stable",
    },
    {
      // https://drafts.csswg.org/css-borders-4/#corner-shaping
      name: "CSSCornersShorthand",
      status: "experimental",
      depends_on: ["CSSCornerShape"],
    },
    {
      // Unprefixed cross-fade() (in addition to the existing -webkit-cross-fade()).
      // https://drafts.csswg.org/css-images-4/#cross-fade-function
      name: "CSSCrossFade",
      status: "experimental",
    },
    {
      // Allows getComputedStyle() and similar to get information about :visited colors.
      // Only safe if PartitionVisitedLinkDatabaseWithSelfLinks is enabled.
      name: "CSSDoNotHideVisitedColor",
    },
    {
      name: "CSSDynamicRangeLimit",
      status: "stable",
    },
    {
      // Include custom properties in CSSComputedStyleDeclaration::item/length.
      // https://crbug.com/949807
      name: "CSSEnumeratedCustomProperties",
      status: "test",
    },
    {
      name: "CSSExponentialFunctions",
      status: "stable",
    },
    {
      name: "CSSFallbackContainerQueries",
      status: "experimental",
    },
    {
      // crbug.com/417306102
      name: "CssFitWidthText",
      status: "test",
    },
    {
      name: "CSSFontSizeAdjust",
      status: "stable",
    },
    {
      // https://drafts.csswg.org/css-mixins-1/#function-rule
      name: "CSSFunctions",
      status: "stable",
    },
    {
      // https://chromestatus.com/feature/5157805733183488
      name: "CSSGapDecoration",
      status: "experimental",
    },
    {
      // This needs to be kept as a runtime flag as long as we need to forcibly
      // disable it for WebView on Android versions older than P. See
      // https://crrev.com/f311a84728272e30979432e8474089b3db3c67df
      name: "CSSHexAlphaColor",
      status: "stable",
    },
    {
      // // https://drafts.csswg.org/css-values-5/#ident
      name: "CSSIdentFunction",
      status: "test",
    },
    {
      // Support making elements inert through the interactivity property.
      name: "CSSInert",
      status: "stable",
    },
    {
      // CSS if() function for custom properties. Flag is used only for media
      // queries support in conditions.
      // https://drafts.csswg.org/css-values-5/#if-notation.
      name: "CSSInlineIfForMediaQueries",
      status: "stable",
    },
    {
      // CSS if() function for custom properties. Flag is used only for style
      // queries support in conditions.
      // https://drafts.csswg.org/css-values-5/#if-notation.
      name: "CSSInlineIfForStyleQueries",
      status: "stable",
    },
    {
      // CSS if() function for custom properties. Flag is used only for supports
      // queries support in conditions.
      // https://drafts.csswg.org/css-values-5/#if-notation.
      name: "CSSInlineIfForSupportsQueries",
      status: "stable",
    },
    {
      // Support for the interest-delay shorthand property.
      // The longhands are controlled by HTMLInterestForAttribute. The
      // shorthand is controlled separately since shorthands can not be enabled
      // by an origin trial.
      name: "CSSInterestDelayShorthand",
      status: "experimental",
    },
    {
      // https://chromestatus.com/feature/6289894144212992
      name: "CSSKeyframesRuleLength",
      status: "stable",
    },
    {
      name: "CSSLayoutAPI",
      status: "experimental",
    },
    {
      name: "CSSLetterSpacingPercentage",
      status: "experimental",
    },
    {
      name: "CSSLineClamp",
      status: "experimental",
    },
    {
      name: "CSSLineClampLineBreakingEllipsis",
      depends_on: ["CSSLineClamp"],
    },
    {
      name: "CSSMarkerNestedPseudoElement",
      status: "stable",
    },
    {
      name: "CSSMasonryLayout",
      status: "test",
      public: true,
    },
    // https://drafts.csswg.org/css-values-5/#progress
    // media-progress()
    {
      name: "CSSMediaProgressNotation",
      status: "experimental",
    },
    {
      name: "CSSMixins",
      status: "test",
    },
    {
      // Kill switch for crbug.com/378966977
      name: "CSSNegatedFeatureless",
      status: "stable",
    },
    {
      name: "CSSNestedPseudoElements",
      status: "stable",
    },
    {
      name: "CSSPaintAPIArguments",
      status: "experimental",
    },
    {
      // Ignore the stylesheet encoding when parsing URLs, always using UTF-8.
      // See crbug.com/1485525.
      name: "CSSParserIgnoreCharsetForURLs",
    },
    {
      name: "CSSPositionStickyStaticScrollPosition",
      status: "test",
    },
    {
      name: "CSSPreferredTextScale",
      status: "stable",
    },
    // https://drafts.csswg.org/css-values-5/#progress
    // progress()
    {
      name: "CSSProgressNotation",
      status: "stable",
    },
    {
      // For ::column pseudo-element for fragment styling.
      // https://github.com/flackr/carousel/blob/main/fragmentation/README.md
      name: "CSSPseudoColumn",
      status: "stable",
    },
    {
      // Enables the :has-slotted pseudo-selector.
      // https://chromestatus.com/feature/5134941143433216
      name: "CSSPseudoHasSlotted",
      status: "experimental",
    },
    {
      // Enables the :open pseudo-selector.
      // https://chromestatus.com/feature/5085419215781888
      name: "CSSPseudoOpen",
      status: "stable",
    },
    {
      // When an audio, video, or similar resource is "playing"
      // or "paused".
      // https://www.w3.org/TR/selectors-4/#video-state
      name: "CSSPseudoPlayingPaused",
      status: "test",
    },
    {
      // For ::scroll-up-button and ::scroll-down-button pseudo-elements for Carousel.
      // https://github.com/flackr/carousel/tree/main/scroll-button
      name: "CSSPseudoScrollButtons",
      status: "stable",
      depends_on: ["PseudoElementsFocusable"],
    },
    {
      // For ::scroll-marker and ::scroll-marker-group pseudo-elements for Carousel.
      // https://github.com/flackr/carousel/tree/main/scroll-marker
      name: "CSSPseudoScrollMarkers",
      status: "stable",
      depends_on: ["PseudoElementsFocusable"],
    },
    {
      // TODO(crbug.com/40932006): CSS 'reading-flow' property for reading order
      // of grid, flexbox and block items.
      // https://drafts.csswg.org/css-display-4/#reading-flow
      // This should ship in M137, and it can be removed after M139.
      name: "CSSReadingFlow",
      status: "stable",
    },
    {
      // TODO(crbug.com/393550130): CSS 'reading-order' property to overwrite
      // reading-flow order.
      // https://drafts.csswg.org/css-display-4/#reading-order
      // This should ship in M137, and it can be removed after M139.
      name: "CSSReadingOrder",
      status: "stable",
      depends_on: ["CSSReadingFlow"],
    },
    {
      // crbug.com/359616070
      name: "CSSRelativeColorLateResolveAlways",
      status: "stable",
    },
    {
      // Non-standard 'auto' keyword for the CSS resize property. Used for
      // selectively enable resize corner for textarea via UA stylesheet, but
      // unintentionally exposed to author sheets. UA rule is now using
      // -internal-textarea-auto instead.
      name: "CSSResizeAuto",
      status: "stable",
    },
    {
      // Enables env(safe-area-max-inset-*).
      // https://github.com/w3c/csswg-drafts/issues/11019
      name: "CSSSafeAreaMaxInset",
      status: "stable"
    },
    {
      name: "CSSSafePrintableInset",
      status: "experimental",
    },
    {
      // The "@import scope(...)" syntax.
      // https://github.com/w3c/csswg-drafts/issues/7348
      name: "CSSScopeImport",
      status: "experimental",
    },
    {
      name: "CSSScrollDirectionContainerQueries",
      status: "test",
    },
    {
      // https://drafts.csswg.org/css-scroll-snap-2#scroll-initial-target
      name: "CSSScrollInitialTarget",
      status: "stable",
    },
    {
      // https://drafts.csswg.org/css-scroll-snap-2/#scrollsnapchange
      name: "CSSScrollSnapChangeEvent",
      status: "stable",
    },
    {
      // https://drafts.csswg.org/css-scroll-snap-2/#scrollsnapchanging
      name: "CSSScrollSnapChangingEvent",
      status: "stable",
    },
    {
      // https://drafts.csswg.org/css-scroll-snap-2/#snapevent-interface
      name: "CSSScrollSnapEventConstructorExposed",
      status: "experimental",
    },
    {
      // https://drafts.csswg.org/css-scroll-snap-2/#snap-events
      name: "CSSScrollSnapEvents",
      status: "stable",
      implied_by: ["CSSScrollSnapChangeEvent", "CSSScrollSnapChangingEvent"],
    },
    {
      // https://drafts.csswg.org/css-scroll-snap-2#scroll-start
      name: "CSSScrollStart",
      status: "test",
    },
    {
      // scroll-target-group property
      // https://drafts.csswg.org/css-overflow-5/#scroll-target-group
      name: "CSSScrollTargetGroup",
      status: "experimental",
    },
    {
      name: "CSSSelectorFragmentAnchor",
      status: "experimental",
      base_feature: "CssSelectorFragmentAnchor",
    },
    {
      // https://drafts.csswg.org/css-shapes-2/#shape-function
      name: "CSSShapeFunction",
      status: "stable",
    },
    {
      name: "CSSShapeFunctionCompositeAnimation",
      status: "stable",
      depends_on: ["CSSShapeFunction", "CompositeClipPathAnimation"]
    },
    {
      name: "CSSShapeFunctionDirectionAgnosticArc",
      status: "stable",
    },
    {
      name: "CSSShapeFunctionOffsetPath",
      status: "stable",
    },
    {
      // Ignore cycles in unused var()/attr() fallbacks.
      name: "CSSShortCircuitVarAttr",
      status: "stable",
      // The CSSShortCircuitVarAttr branch assumes that fallbacks
      // are type-agnostic.
      depends_on: ["CSSTypeAgnosticVarFallback"],
    },
    {
      // sibling-index() and sibling-count()
      name: "CSSSiblingFunctions",
      status: "stable",
    },
    {
      // Allow sibling-index() and sibling-count() in @container queries
      name: "CSSSiblingFunctionsInContainerQueries",
      status: "stable",
    },
    {
      name: "CSSSignRelatedFunctions",
      status: "stable",
    },
    {
      // Explainer: https://drafts.csswg.org/css-values/#round-func
      name: "CSSSteppedValueFunctions",
      status: "stable",
    },
    {
      name: "CSSSupportsAtRuleFunction",
      status: "experimental",
    },
    {
      name: "CSSSupportsForImportRules",
      status: "stable",
    },
    {
      // Allows the CSS "accent-color" property to support the system accent color as the default option.
      name: "CSSSystemAccentColor",
      status: {
        "ChromeOS": "stable",
        "Mac": "stable",
        "Win": "stable",
        "default": "experimental",
      },
    },
    {
      // crbug.com/1463890: CSS `text-autospace` property
      name: "CSSTextAutoSpace",
      status: "experimental",
    },
    {
      // crbug.com/1463890, crbug.com/1463891: CSS `text-spacing` shorthand
      name: "CSSTextSpacing",
      depends_on: ["CSSTextAutoSpace"],
      status: "experimental",
    },
    {
      // crbug.com/41442840: Enabled by default on M139, remove after M141.
      name: "CSSTransitionNoneRunningTransitionsFix",
      status: "stable",
    },
    {
      // Support for tree-scoped [1] timeline names (e.g. produced by
      // scroll-timeline).
      //
      // [1] https://drafts.csswg.org/css-scoping-1/#shadow-names
      name: "CSSTreeScopedTimelines",
    },
    {
      // The var() fallback does not validate against the type
      // of the custom property being referenced.
      name: "CSSTypeAgnosticVarFallback",
      status: "stable",
    },
    {
      name: "CSSTypedArithmetic",
      status: "experimental",
    },
    // Support for `user-select:contain`.
    {
      name: "CSSUserSelectContain",
      status: "test",
    },
    {
      name: "CSSVideoDynamicRangeMediaQueries",
      status: "experimental",
    },
    {
      // https://chromestatus.com/feature/4850737974345728
      name: "CSSViewTransitionAutoName",
      status: "experimental",
    },
    {
      // Adds the appearance:base-select CSS value which makes <select>
      // rendering using alternate content in the UA shadowroot which is
      // customizable.
      name: "CustomizableSelect",
      status: "stable",
      // SelectParserRelaxation is needed to allow more content in <select>
      // than just <option>s etc.
      depends_on: ["SelectParserRelaxation"],
    },
    {
      // If a node within a customizable <select> doesn't obey the content
      // model, an Issue is reported to DevTools so that web authors get more
      // context on why this can impact the accessibility behavior of the
      // <select>. Shipped in M138, flag can be removed M140.
      name: "CustomizableSelectElementAccessibilityIssues",
      status: "stable",
      depends_on: ["CustomizableSelect"],
    },
    {
      // appearance:base-select for <select multiple> and <select size=n>
      // https://issues.chromium.org/issues/357649033
      name: "CustomizableSelectInPage",
      status: "experimental",
      depends_on: ["CustomizableSelect"],
    },
    {
      // appearance:base-select for <select multiple size=1> with a picker.
      name: "CustomizableSelectMultiplePopup",
      status: "experimental",
      depends_on: ["CustomizableSelectInPage"],
    },
    {
      // Replaces \r\n and \r with \n in setCustomValidity.
      // https://github.com/whatwg/html/pull/10350
      // https://issues.chromium.org/issues/340814283
      name: "CustomValidityNormalizeNewlines",
      status: "stable",
    },
    {
      // https://chromestatus.com/feature/5134293578285056
      name: "Database",
    },
    {
      // Fix HandleMouseFocus selection for delegated focus text control.
      // See https://crbug.com/400317114
      // This feature was shipped in M136, so this flag can be removed in M138.
      name: "DelegatesFocusTextControlFix",
      status: "stable",
    },
    // This allows pages to opt out of the unload deprecation. Enabling this
    // allows unload event handers to be used in the frame regardless of any
    // Permissions-Policy setting.
    // https://crbug.com/1432116
    {
      name: "DeprecateUnloadOptOut",
      origin_trial_feature_name: "DeprecateUnloadOptOut",
      origin_trial_type: "deprecation",
      origin_trial_allows_third_party: true,
      origin_trial_allows_insecure: true,
    },
    {
      name: "DesktopCaptureDisableLocalEchoControl",
      status: "experimental",
    },
    {
      name: "DesktopPWAsAdditionalWindowingControls",
      status: "test",
    },
    {
      name: "DesktopPWAsSubApps",
      status: "test",
    },
    {
      name: "DeviceAttributes",
      status: {
        "ChromeOS": "stable",
        "default": "experimental",
      },
    },
    {
      name: "DeviceAttributesPermissionPolicy",
      status: "experimental",
    },
    {
      name: "DeviceBoundSessionCredentials",
      origin_trial_feature_name: "DeviceBoundSessionCredentials",
      origin_trial_os: ["win", "linux", "mac"],
      status: "experimental",
      // Killswitch is net::features::kDeviceBoundSessions
      base_feature: "none",
    },
    {
      name: "DeviceOrientationRequestPermission",
      status: "experimental",
    },
    {
      name: "DevicePosture",
      status: "stable",
    },
    {
      // This feature makes the <dialog> element close properly when its "open"
      // attribute is removed. https://github.com/whatwg/html/issues/5802 and
      // https://github.com/whatwg/html/pull/10124.
      name: "DialogCloseWhenOpenRemoved",
      status: "experimental",
    },
    {
      // This feature makes the dialog element fire beforetoggle and toggle
      // events every time it is closed or opened.
      // https://bugs.chromium.org/p/chromium/issues/detail?id=1521813
      name: "DialogElementToggleEvents",
      status: "stable",
    },
    {
      name: "DialogNewFocusBehavior",
      status: "experimental",
      depends_on: ["NewGetFocusableAreaBehavior"],
    },
    {
      name: "DigitalGoods",
      origin_trial_feature_name: "DigitalGoodsV2",
      origin_trial_os: ["android", "chromeos"],
      public: true,
      status: {
        "Android": "stable",
        "ChromeOS": "stable",
        // crbug.com/1143079: Web tests cannot differentiate ChromeOS and Linux,
        // so enable the API on all platforms for testing.
        "default": "test"
      },
      base_feature: "none",
    },
    {
      name: "DigitalGoodsV2_1",
      status: {
        "Android": "stable",
        "ChromeOS": "stable",
        // crbug.com/1143079: Web tests cannot differentiate ChromeOS and Linux,
        // so enable the API on all platforms for testing.
        "default": "test"
      },
    },
    {
      name: "DirectSockets",
      public: true,
      status: "stable",
    },
    {
      // Experimental support for the Direct Sockets API in Service Workers.
      // https://github.com/WICG/direct-sockets
      name: "DirectSocketsInServiceWorkers",
      status: "test",
      depends_on: ["DirectSockets"],
    },
    {
      // Experimental support for the Direct Sockets API in Shared Workers.
      // https://github.com/WICG/direct-sockets
      name: "DirectSocketsInSharedWorkers",
      status: "test",
      depends_on: ["DirectSockets"],
    },
    {
      name: "DisableDifferentOriginSubframeDialogSuppression",
      base_feature: "none",
      origin_trial_feature_name: "DisableDifferentOriginSubframeDialogSuppression",
      origin_trial_type: "deprecation",
      origin_trial_allows_insecure: true,
    },
    {
      name: "DisableReduceAcceptLanguage",
      origin_trial_feature_name: "DisableReduceAcceptLanguage",
      origin_trial_type: "deprecation",
      origin_trial_allows_insecure: true,
      origin_trial_allows_third_party: true,
      base_feature: "none",
    },
    {
      // `kHidden` and `kHiddenButPainting` visibility states are treated as
      // hidden in the sense of `document.visibilityState`.  However, they are
      // handled differently internally.  For example, video playback should
      // continue in `kHiddenButPainting`, such as when the page is being
      // background captured.  When enabled, this feature causes blink to
      // notify internal observers about visibility changes between the two
      // hidden states, in addition to transitions to/from `kVisible`.
      //
      // Since the two hidden states are exposed to the web identically, there
      // is no `visibilitychanged` event fired when switching between them.
      //
      // When this feature is disabled, blink reverts to its original behavior
      // of eliding transitions between the two hidden states, including to
      // internal observers.  This behavior causes problems with capture and
      // picture-in-picture, but is preserved as a safe fallback.
      name: "DispatchHiddenVisibilityTransitions",
      status: "stable",
      base_feature: "DispatchHiddenVisibilityTransitions",
    },
    {
      // Dispatch selectionchange event per element according to the new spec:
      // https://w3c.github.io/selection-api/#selectionchange-event
      name: "DispatchSelectionchangeEventPerElement",
      status: "stable",
    },
    {
      // Allowing elements with display:contents to have focus.
      // See https://crbug.com/1366037
      name: "DisplayContentsFocusable",
      status: "experimental",
    },
    {
      name: "DisplayCutoutAPI",
      base_feature: "none",
      public: true,
    },
    {
      name: "DocumentCookie",
    },
    {
      name: "DocumentDomain",
    },
    {
      // Enables DocumentIsolationPolicy.
      // See https://https://github.com/WICG/document-isolation-policy.
      name: "DocumentIsolationPolicy",
      status: "experimental",
      origin_trial_feature_name: "DocumentIsolationPolicy",
      origin_trial_os: ["win", "mac", "linux", "chromeos"],
      base_feature: "none",
    },
    {
      name: "DocumentOpenOriginAliasRemoval",
      status: "experimental",
      copied_from_base_feature_if: "overridden",
    },
    {
      name: "DocumentOpenSandboxInheritanceRemoval",
      status: "stable",
      copied_from_base_feature_if: "overridden",
    },
    {
      name: "DocumentPictureInPictureAPI",
      status: {
        "Android": "",
        "default": "stable",
      },
    },
    // Enables `preferInitialWindowPlacement` Document PiP option to skip
    // re-using the previous pip window bounds.
    {
      name: "DocumentPictureInPicturePreferInitialPlacement",
      status: {
        "Android": "",
        "default": "stable",
      },
    },
    // Enables propagating user activation from a document picture-in-picture
    // window up to its opener window and vice versa.
    {
      name: "DocumentPictureInPictureUserActivation",
      status: {
        "Android": "",
        "default": "stable",
      },
    },
    // Enables the ability to use Document Policy header to control feature
    // DocumentDomain.
    {
      name: "DocumentPolicyDocumentDomain",
      status: "experimental",
    },
    // Enables the ability to use Document Policy header to control feature
    // ExpectNoLinkedResources.
    {
      name: "DocumentPolicyExpectNoLinkedResources",
      status: "stable",
    },
    // Enables the ability to use Document Policy header to control feature
    // IncludeJSCallStacksInCrashReports. https://chromestatus.com/feature/4731248572628992
    {
      name: "DocumentPolicyIncludeJSCallStacksInCrashReports",
      status: "stable",
    },
    {
      name: "DocumentPolicyNegotiation",
      origin_trial_feature_name: "DocumentPolicyNegotiation",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    // Enables the ability to use Document Policy header to control feature
    // SyncXHR.
    {
      name: "DocumentPolicySyncXHR",
      status: "experimental",
    },
    {
      name: "DocumentWrite",
    },
    {
      // This is a flag for performance improvements that shipped in M134,
      // for use as a kill-switch and for other finch measurement in Q2 2025.
      name: "DOMInsertionFaster",
      status: "stable",
    },
    {
      name: "DOMPartsAPI",
      status: "experimental",
      implied_by: ["DOMPartsAPIMinimal"],
    },
    {
      name: "DOMPartsAPIMinimal",
    },
    // Dynamically change the safe area insets based on the bottom browser
    // controls visibility.
    {
      name: "DynamicSafeAreaInsets",
      status: {"Android": "stable"},
    },
    // Dynamically change the safe area insets as browser controls scrolls.
    {
      name: "DynamicSafeAreaInsetsOnScroll",
      depends_on: ["DynamicSafeAreaInsets"],
      status: {"Android": "stable"},
    },
    {
      // crbug.com/341564372
      name: "EditingFastDelete",
      status: "stable",
    },
    {
      // crbug.com/341564372
      name: "EditingFastRichReplace",
      status: "stable",
    },
    {
      name: "ElementCapture",
      status: {"Android": "", "default": "stable"},
    },
    {
      name: "ElementInnerTextHandleFirstLineStyle",
      status: "stable",
    },
    {
      // crbug.com/40118302
      name: "EmptyReferenceFilterInvalidation",
      status: "stable",
    },
    {
      name: "EnforceAnonymityExposure",
      status: "stable",
    },
    {
      // See: crbug.com/40771555
      name: "EnterInOpenShadowRoots",
      status: "stable",
    },
    {
      // Escapes "<" and ">" in attribute values. This was launched
      // in M138, and this flag can be removed in M140.
      // See: crbug.com/1175016
      name: "EscapeLtGtInAttributes",
      status: "stable",
    },
    {
      name: "EventTimingHandleKeyboardEventSimulatedClick",
      status: "stable",
    },
    {
      name: "EventTimingInteractionCount",
      status: "experimental",
    },
    {
      // Event Timings should not get interactionId assigned if the next paint
      // was affected by autoscroll, i.e. from text selection.
      name: "EventTimingSelectionAutoScrollNoInteractionId",
      status: "stable",
    },
    {
      name: "ExperimentalContentSecurityPolicyFeatures",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "ExperimentalJSProfilerMarkers",
      status: "experimental",
    },
    {
      name: "ExperimentalMachineLearningNeuralNetwork",
      // Enabled by webnn::mojom::features::kExperimentalWebMachineLearningNeuralNetwork.
      base_feature: "none",
    },
    {
      name: "ExperimentalPolicies",
      status: "experimental",
    },
    {
      name: "ExposeCoarsenedRenderTime",
      status: "stable",
    },
    {
      name: "ExposeCSSFontFeatureValuesRule",
      status: "stable",
    },
    {
      name: "ExposeRenderTimeNonTaoDelayedImage",
    },
    {
      name: "ExtendedTextMetrics",
      status: "experimental",
    },
    {
      // Kill-switch for crbug.com/40434449.
      // Added in M139, and it can be removed in M141.
      name: "ExternalPopupMenuClickEvent",
      status: "stable",
    },
    {
      name: "EyeDropperAPI",
      status: {
        // EyeDropper UI is available on ChromeOS, Linux (x11), Mac, and Win.
        // This list should match the supported operating systems for the
        // kEyeDropper base::Feature.
        "ChromeOS": "stable",
        "Linux": "stable",
        "Mac": "stable",
        "Win": "stable",
      },
      // When running under experimental platform variants, such as
      // Linux/Wayland, EyeDropper base::Feature defined in the browser
      // process is used to disable it at runtime, if needed.
      base_feature: "none",
      public: true,
    },
    {
      name: "FaceDetector",
      status: "experimental",
    },
    // Kill switch.
    {
      name: "FastClearNeedsRepaint",
      status: "stable",
    },
    {
      name: "FastPositionIterator",
      // Not enabled due to a RTL issue. crbug.com/1421016.
    },
    {
      // crbug.com/414112253
      name: "FastSelectionSync",
      status: "stable",
      depends_on: ["SelectionDeleteFromDocumentUaShadowFix"],
    },
    {
      name: "FedCm",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "FedCmAutofill",
      implied_by: ["FedCmDelegation"],
      public: true,
      status: "test",
      base_feature: "none",
    },
    {
      name: "FedCmDelegation",
      depends_on: ["FedCm"],
      public: true,
      status: "test",
      base_feature: "none",
    },
    {
      name: "FedCmIdPRegistration",
      depends_on: ["FedCm"],
      public: true,
      status: "test",
      base_feature: "none",
    },
    {
      name: "FedCmLightweightMode",
      depends_on: ["FedCm"],
      status: "test",
      public: true,
      base_feature: "none",
    },
    {
      name: "FedCmMultipleIdentityProviders",
      depends_on: ["FedCm"],
      status: "stable",
      base_feature: "none",
      public: true,
      origin_trial_feature_name: "FedCmMultipleIdentityProviders",
      origin_trial_os: ["win", "mac", "linux", "chromeos"],
      origin_trial_allows_third_party: true,
    },
    {
      name: "FencedFrames",
      base_feature: "none",
      // This helps enable and expose the <fencedframe> element, but note that
      // blink::features::kFencedFrames must be enabled as well, as we require
      // the support of the browser process to fully enable the feature.
      // Enabling this runtime enabled feature alone has no effect.
      public: true,
      status: "stable",
    },
    {
      name: "FencedFramesAPIChanges",
      // Various new IDL attributes on the <fencedframe> element (such as
      // `config`, `sandbox`, and `allow`).
      base_feature_status: "enabled",
      copied_from_base_feature_if: "enabled_or_overridden",
      status: "stable",
    },
    {
      name: "FencedFramesDefaultMode",
      base_feature_status: "disabled",
      copied_from_base_feature_if: "enabled_or_overridden",
      public: true,
    },
    {
      // Allows fenced frames to access unpartioned data via Shared Storage in
      // exchange for disabling untrusted network access. This is the Blink
      // counterpart of the base::Feature with the same name. Because local
      // unpartitioned data access requires browser and renderer process
      // coordination, the value of this flag is strictly controlled by the
      // base::Feature variant, and setting this flag does nothing.
      name: "FencedFramesLocalUnpartitionedDataAccess",
      base_feature: "none",
      public: true,
    },
    {
      // Add Request.bytes() and Response.bytes()
      // https://chromestatus.com/feature/5239268180754432
      name: "FetchBodyBytes",
      status: "stable",
    },
    {
      // The Blink runtime-enabled feature name for the API's IDL.
      // https://chromestatus.com/feature/4654499737632768
      name: "FetchLaterAPI",
      status: "stable",
    },
    {
      // The retry ability for Fetch keepalive requests.
      // https://chromestatus.com/feature/5181984581877760
      name: "FetchRetry",
      origin_trial_feature_name: "FetchRetry",
      origin_trial_allows_third_party: true,
      status: "experimental",
      base_feature: "FetchRetry",
      // base_feature is meant as kill-switch. This runtime-enabled feature
      // should follow the Origin Trial unless explicitly overriden by Finch or
      // commandline flags.
      base_feature_status: "enabled",
      // Enables the Blink feature only when the base::Feature is overridden by
      // field trial or command line.
      copied_from_base_feature_if: "overridden",
    },
    {
      name: "FetchUploadStreaming",
      status: "stable",
    },
    {
      // Killswitch M136.
      name: "FewerSubsequences",
      status: "stable",
    },
    {
      // Also enabled when blink::features::kFileHandlingAPI is overridden
      // on the command line (or via chrome://flags).
      name: "FileHandling",
      depends_on: ["FileSystemAccessLocal"],
      status: {"Android": "test", "default": "stable"},
      base_feature: "FileHandlingAPI",
    },
    {
      name: "FileHandlingIcons",
      depends_on: ["FileHandling"],
      status: {"Android": "test", "default": "experimental"},
      base_feature: "none",
    },
    {
      name: "FileSystem",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      // Shared objects by OPFS and non-OPFS File System Access API.
      name: "FileSystemAccess",
      implied_by: ["FileSystemAccessLocal", "FileSystemAccessOriginPrivate"],
    },
    {
      // In-development features for the File System Access API.
      name: "FileSystemAccessAPIExperimental",
      status: "experimental",
    },
    {
      // The FileSystemHandle.getCloudIdentifiers() method (see
      // crbug.com/1443354).
      name: "FileSystemAccessGetCloudIdentifiers",
      status: {
        "ChromeOS": "experimental",
        "default": "",
      }
    },
    {
      // Non-OPFS File System Access API.
      name: "FileSystemAccessLocal",
      status: {"default": "stable"},
    },
    {
      name: "FileSystemAccessLockingScheme",
      status: "stable",
    },
    {
      // OPFS File System Access API.
      name: "FileSystemAccessOriginPrivate",
      status: "stable",
    },
    {
      // The FileSystemObserver interface for the File System Access API.
      // See https://crbug.com/1019297.
      name: "FileSystemObserver",
      depends_on: ["FileSystemAccess"],
      status: {
        "Android": "experimental",
        "iOS": "experimental",
        "default": "stable",
      },
    },
    {
      // The unobserve function of the FileSystemObserver.
      // See https://crbug.com/321980469.
      name: "FileSystemObserverUnobserve",
      status: "experimental",
    },
    {
      name: "FindFirstMisspellingEndWhenNonEditable",
      status: "stable",
    },
    {
      // crbug.com/408309951
      name: "FindNestedAnnotationFix",
      status: "stable",
    },
    {
      // crbug.com/409358630
      name: "FindOrphanAnnotationFix",
      status: "stable",
    },
    {
      // crbug.com/411739501
      name: "FixNextPositionCalculationInInsertList",
      status: "stable",
    },
    {
      name: "Fledge",
      status: "stable",
      base_feature: "none",
      public: true,
    },
    {
      // Enables deal support within auctions.
      name: "FledgeAuctionDealSupport",
      status: "test",
    },
    {
      name: "FledgeBiddingAndAuctionServerAPI",
      origin_trial_feature_name: "FledgeBiddingAndAuctionServer",
      origin_trial_allows_third_party: true,
      base_feature: "none",
      status: "stable",
    },
    {
      name: "FledgeBiddingAndAuctionServerAPIMultiSeller",
      status: "stable",
    },
    {
      name: "FledgeClickiness",
      status: "test",
    },
    {
      name: "FledgeCustomMaxAuctionAdComponents",
      status: "stable",
    },
    {
      // Enables using a 'deprecatedRenderURLReplacements' field within the
      // Protected Audience ad auction config.
      name: "FledgeDeprecatedRenderURLReplacements",
      public: true,
      status: "stable",
    },
    {
      name: "FledgeDirectFromSellerSignalsHeaderAdSlot",
      status: "stable",
    },
    {
      // Feature flag to control removal, in case we run into unexpected
      // breakage.
      //
      // TODO(crbug.com/384481095): Remove in a few milestones, along with the
      // implementation code.
      name: "FledgeDirectFromSellerSignalsWebBundles",
    },
    {
      name: "FledgeMultiBid",
      public: true,
      status: "stable",
    },
    {
      // Enables the private model training API in Protected Audience.
      // https://github.com/WICG/turtledove/blob/main/PA_private_model_training.md
      name: "FledgePrivateModelTraining",
      status: "test",
    },
    {
      // Enables real time reporting API in Protected Audience.
      // https://github.com/WICG/turtledove/blob/main/PA_real_time_monitoring.md
      name: "FledgeRealTimeReporting",
      public: true,
      status: "stable",
    },
    {
      // Enables the ability to set seller nonces on the header response and
      // use bidNonce in bids.
      name: "FledgeSellerNonce",
      status: "stable",
    },
    {
      // Enables having `executionMode` in the auctionConfig to use for seller scripts.
      name: "FledgeSellerScriptExecutionMode",
      status: "test",
    },
    {
      name: "FledgeTrustedSignalsKVv1CreativeScanning",
      status: "test",
    },
    {
      name: "FledgeTrustedSignalsKVv2ContextualData",
      depends_on: ["FledgeTrustedSignalsKVv2Support"],
      status: "test",
    },
    {
      name: "FledgeTrustedSignalsKVv2Support",
      status: "stable",
    },
    {
      name: "FlexWrapBalance",
      status: "experimental",
    },
    {
      // Don't create LayoutMultiColumnFlowThread objects, or any of the other
      // legacy multicol objects.
      name: "FlowThreadLess",
      depends_on: ["LayoutBoxVisualLocation"],
      status: "stable",
    },
    {
      name: "FluentOverlayScrollbars",
      // The associated base feature is defined in
      // ui/native_theme/native_theme_features.cc.
      base_feature: "none",
    },
    {
      name: "FluentScrollbars",
      // The associated base feature is defined in
      // ui/native_theme/native_theme_features.cc.
      base_feature: "none",
    },
    {
      name: "Focusgroup",
      status: "experimental",
      base_feature: "none",
      origin_trial_feature_name: "Focusgroup",
    },
    {
      name: "FontAccess",
      status: {"Android": "", "default": "stable"},
    },
    {
      name: "FontFamilyPostscriptMatchingCTMigration",
    },
    {
      name: "FontFamilyStyleMatchingCTMigration",
    },
    {
      // crbug.com/40398871
      name: "FontFeatureSettingsDescriptor",
      status: "experimental",
    },
    {
      name: "FontPresentWin",
      status: "stable",
    },
    {
      name: "FontSrcLocalMatching",
      base_feature: "none",
      // No status, as the web platform runtime enabled feature is controlled by
      // a Chromium level feature.
    },
    {
      name: "FontSystemFallbackNotoCjk",
      status: "stable",
    },
    {
      // TODO(crbug.com/1231644): This flag is being kept (even though the
      // feature has shipped) until there are settings to allow users to
      // customize the feature.
      name: "ForcedColors",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    // Killswitch M135.
    {
      name: "ForceDelayedIntersectionUpdate",
      status: "stable",
    },
    {
      // This is used in tests to perform memory measurement without
      // waiting for GC.
      name:"ForceEagerMeasureMemory",
    },
    {
      // https://github.com/flackr/reduce-motion/blob/main/explainer.md
      name: "ForceReduceMotion",
    },
    {
      // TODO(crbug.com/1419161): Remove this feature after M113 has been stable
      // for a few weeks or more. This is a kill switch that, when enabled, goes
      // back to the old behavior, which was to restore the state for <input>
      // and <select> even when they had `autocomplete=off`.
      name: "FormControlRestoreStateIfAutocompleteOff",
    },
    {
      // TODO(crbug.com/1432009) Allow form controls with vertical writing mode
      // to have direction affect the flow of the control.
      name: "FormControlsVerticalWritingModeDirectionSupport",
      status: "stable",
    },
    {
     // TODO(crbug.com/389587444): Remove this feature after M134 is stable.
     // Form-associated custom elements should check isFocusable on the
     // focus delegate if the shadow host has delegatesFocus=true.
     name: "FormValidationCustomElementsDelegatesFocusFix",
     status: "stable",
    },
    {
      name: "FractionalScrollOffsets",
      base_feature: "none",
      public: true,
    },
    {
      name: "FreezeFramesOnVisibility",
      status: "experimental",
    },
    {
      name: "GamepadMultitouch",
      status: "experimental",
      public: true,
    },
    {
      name: "GetAllScreensMedia",
      depends_on: ["GetDisplayMedia"],
      public: true,
      status: {
        "ChromeOS": "stable",
        "default": "test",
      },
    },
    {
      name: "GetComputedStyleOutsideFlatTree",
      status: "stable",
    },
    {
      name: "GetDisplayMedia",
      public: true,
      status: {
        "Android": "experimental",
        "default": "stable",
      },
      base_feature: "none",
    },
    {
      name: "GetDisplayMediaRequiresUserActivation",
      depends_on: ["GetDisplayMedia"],
      status: "experimental",
    },
    {
      name: "GroupEffect",
      status: "test",
    },
    {
      // Enables Skipping children for invisible select elements containing
      // non-editable node while calculating end of paragraph.
      name: "HandleDeletionAtStartAndEndBoundaryContainingHiddenElement",
      status: "stable",
    },
    {
      name: "HandwritingRecognition",
      status: {
        "ChromeOS": "stable",
        "default": "experimental",
      },
    },
    {
      name: "HarfBuzzBufferPool",
      status: "stable",
    },
    {
      name: "HasUAVisualTransition",
      status: "stable",
    },
    // TODO(crbug.com/333628468): Enables the `headingoffset` and
    // `headingreset` attributes, which allow for alternate styles of building
    // structured headings. This is being actively prototyped, starting ~M136.
    // For more see https://github.com/whatwg/html/issues/5033
    {
      name: "HeadingOffset",
      status: "experimental",
    },
    {
      name: "HighlightInheritance",
      status: "stable",
    },
    {
      name: "HighlightPointerEvents",
    },
    {
      name: "HighlightsFromPoint",
      status: "test",
    },
    {
      name: "HrefTranslate",
      depends_on: ["TranslateService"],
      origin_trial_feature_name: "HrefTranslate",
      status: "stable",
      base_feature: "none",
    },
    // The `anchor` attribute, supported by both anchor positioning and the
    // popover API.
    {
      name: "HTMLAnchorAttribute",
      status: "experimental",
    },
    // Additional default command/commandfor actions that aren't part of v1 of
    // commands. When this flag is disabled only v1 actions (popover and dialog
    // defaults) will work.
    {
      name: "HTMLCommandActionsV2",
      depends_on: ["HTMLCommandAttributes"],
      status: "test",
    },
    // Adds support for the `command` and `commandfor` attributes, as specified
    // in the open-ui "Invokers" explainer.
    // https://open-ui.org/components/invokers.explainer/
    // This feature was shipped in M135 and can be removed in M137.
    {
      name: "HTMLCommandAttributes",
      status: "stable",
    },
    // Adds support for the 'request-close' command.
    {
      name: "HTMLCommandRequestClose",
      depends_on: ["HTMLCommandAttributes"],
      status: "stable",
    },
    {
      name: "HTMLElementScrollParent",
      status: "experimental",
    },
    // The `<embed>` should follow the specification, layout is not forced
    // when the `type` attribute is set to `image`.
    // https://html.spec.whatwg.org/C/#the-embed-element
    // This feature was shipped in M131, so this flag can be removed in M133.
    {
      name: "HTMLEmbedElementNotForceLayout",
      status: "stable",
    },
    // The width attribute on the hr element, previously converted 0 values to 1px.
    // This will ship in M133, so should be safe to remove in M135.
    {
      name: "HTMLHRWidthAllowZero",
      status: "stable"
    },
    // Return a natural width/height of zero from
    // HTMLImageElement.naturalWidth/Height for SVG images that don't have a
    // natural width/height set.
    {
      name: "HTMLImageElementActualNaturalSize",
      status: "test",
    },
    // Adds support for the experimental `interesttarget`
    // attributes, as specified in the open-ui "Interest Invokers" explainer.
    // https://open-ui.org/components/interest-invokers.explainer/
    {
      name: "HTMLInterestTargetAttribute",
      status: "experimental",
      origin_trial_feature_name: "HTMLInterestTargetAttribute",
      origin_trial_allows_third_party: true,
    },
    // Enables the "context menu item only" behavior mode for the
    // `interesttarget` API. In this mode, the context menu is displayed in the
    // "normal" location, but an additional line item is added to the menu which
    // allows the user to show interest. This is enabled by default, but depends
    // on HTMLInterestTargetAttribute.
    {
      name: "HTMLInterestTargetContextMenuItemOnly",
      status: "stable",
      depends_on: ["HTMLInterestTargetAttribute"],
    },
    // If this flag is enabled, the "partial interest" concept for the
    // `interesttarget` API is not used. When an interest invoker is focused,
    // the target immediately gets full interest, regardless of whether it
    // contains focusable content. This is primarily to test the behavior with
    // users, to see which is the best.
    {
      name: "HTMLInterestTargetNoPartialInterest",
      depends_on: ["HTMLInterestTargetAttribute"],
    },
    {
      // A flag, just for local testing to make the
      // HTML parser yield more often and take longer to resume.
      // This helps when debugging flaky tests caused by parser
      // yielding heuristics.
      name: "HTMLParserYieldAndDelayOftenForTesting",
    },
    {
      name: "HTMLParserYieldByUserTiming",
      status: "test",
    },
    {
      // When enabled, specifies visual affordances for printing such as headers,
      // footers and page numbers, to be PDF annotations.
      // See section 14.8.2.2.1 here for info:
      // https://opensource.adobe.com/dc-acrobat-sdk-docs/pdfstandards/PDF32000_2008.pdf
      name: "HTMLPrintingArtifactAnnotations",
      status: "stable",
    },

    {
      name: "HTMLSelectElementShowPicker",
      status: "stable",
    },
    {
      name: "ICUCapitalization",
      status: "experimental",
    },
    {
      name: "IgnoreLetterSpacingInCursiveScripts",
      status: "stable",
    },
    {
      // crbug.com/40602913
      name: "IgnoreOutOfFlowPositionForPreviousText",
      status: "stable",
    },
    {
      name: "ImageDataPixelFormat",
      status: "stable",
    },
    {
      name: "ImplicitRootScroller",
      public: true,
      settable_from_internals: true,
      status: {"Android": "stable"},
      base_feature: "none",
    },
    // This change, although technically breaking, is expected to be fully web-compatible
    // due to how import attributes are currently used in the ecosystem. However, this is
    // a killswitch just in case. This can be removed once it ships to stable and no
    // regressions are reported.
    {
      name: "ImportAttributesDisallowUnknownKeys",
      status: "stable"
    },
    {
      name: "ImportMapIntegrity",
      status: "stable"
    },
    {
      // Improved retargeting behavior of ToggleEvent.source and
      // CommandEvent.source to match Event.relatedTarget.
      // crbug.com/420639769
      name: "ImprovedSourceRetargeting",
      status: "experimental",
    },
    {
      name: "IncomingCallNotifications",
    },
    {
       // When enabled, every traversable mainframe same-doc navigation will
       // increment the `viz::LocalSurfaceId` from the impl thread.
      name: "IncrementLocalSurfaceIdForMainframeSameDocNavigation",
      status: {"Android": "stable"},
    },
    {
      name: "IndexedDbGetAllRecords",
      status: "experimental",
    },
    {
      name: "InertElementNonEditable",
      status: "stable",
    },
    {
      // If a painting bug no longer reproduces with this feature enabled, then
      // the bug is caused by incorrect cull rects.
      name: "InfiniteCullRect",
    },
    {
      name: "InheritUserModifyWithoutContenteditable",
      status: "stable",
    },
    {
      // crbug.com/370217727
      name: "InitialLetterRaiseBySpecified",
      status: "stable",
    },
    {
      name: "InlineBlockInSameLine",
      status: "stable",
    },
    {
      // If enabled, and the inner html parser is unable to successfully
      // parse, it will log histograms of why it failed. The logging is
      // non-trivial.
      name: "InnerHTMLParserFastpathLogFailure",
      status: "experimental",
    },
    {
      name: "InputEventConstructorThrows",
      status: "stable",
    },
    {
      // The HTML parser inserts a </select> end tag before inserting <input>
      // when parsing inside of a <select> tag. We want to allow <input> inside
      // <select>, but it isn't web compatible enough. This flag allows <input>
      // inside <select> but only if there is another open tag in between the
      // <input> and the <select>, like <select><div><input>.
      // For now, this flag also makes <input> close <select> like it used to
      // when the <input> is put directly within an <option> or <optgroup>.
      name: "InputInSelect",
      status: "experimental",
      depends_on: ["SelectParserRelaxation"],
    },
    {
      name: "InputMultipleFieldsUI",
      // No plan to support complex UI for date/time INPUT types on Android and
      // iOS.
      status: {"Android": "test", "iOS": "test", "default": "stable"},
    },
    // Insert a blockquote before a outer block after creating the blockquote
    // when indenting a node whose outer block is a blockquote. See
    // https://crbug.com/327665597
    {
      name: "InsertBlockquoteBeforeOuterBlock",
      status: "stable",
    },
    {
      name: "InsertLineBreakIfInlineListItem",
      status: "stable",
    },
    {
      // crbug.com/1420675
      name: "InsertLineBreakIfPhrasingContent",
      status: {"Android": "test", "default": "stable"},
    },
    {
      // Improved support for debugging CSSNestedDeclarations.
      name: "InspectorGhostRules",
      status: "stable",
    },
    {
      name: "InstalledApp",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "InstallOnDeviceSpeechRecognition",
      status: "stable",
    },
    {
      name: "IntegrityPolicyScript",
      status: "stable",
      base_feature: "none",
      public: true,
    },
    {
      name: "InterestGroupsInSharedStorageWorklet",
      public: true,
      status: "stable",
    },
    {
      name: "InteroperablePrivateAttribution",
      status: "experimental",
    },
    {
      // If enabled, IntersectionObserverScrollMargin will be parsed.
      name: "IntersectionObserverScrollMargin",
      status: "stable",
    },
    {
      name: "InvertedColors",
      status: "experimental",
    },
    {
      name: "InvisibleSVGAnimationThrottling",
      status: "stable",
    },
    {
      name: "IsolatedSVGDocumentOptimization",
      status: "stable",
    },
    {
      name: "JavaScriptCompileHintsPerFunctionMagicRuntime",
      status: "experimental",
      origin_trial_feature_name: "JavaScriptCompileHintsPerFunctionMagic",
    },
    {
      name: "JavaScriptSourcePhaseImports",
    },
    {
      name: "KeyboardAccessibleTooltip",
      status: "experimental",
      base_feature: "none",
    },
    {
      // TODO(crbug.com/40113891): This feature allows scrollers to be
      // keyboard focusable by default. This was enabled by default in M130,
      // but this flag should not be removed until the origin trial and
      // enterprise policies have both expired. See the
      // KeyboardFocusableScrollersOptOut flag.
      name: "KeyboardFocusableScrollers",
      status: "stable",
    },
    {
      // TODO(crbug.com/40113891): Disables KeyboardFocusableScrollers.
      // This feature only takes effect if KeyboardFocusableScrollers is
      // enabled. It will overwrite the behavior and not allow scrollers to be
      // keyboard focusable by default.
      name: "KeyboardFocusableScrollersOptOut",
      origin_trial_feature_name: "KeyboardFocusableScrollersOptOut",
      // This is not a feature that is being deprecated, but the origin trial
      // *is* being used to allow sites to opt back out of the feature launch.
      // So we're marking it as a "deprecation" trial.
      origin_trial_type: "deprecation",
      origin_trial_allows_insecure: true,
      origin_trial_allows_third_party: true,
    },
    {
      name: "LangAttributeAwareFormControlUI",
      settable_from_internals: true,
    },
    {
      name: "LanguageDetectionAPI",
      status: {
        "Win": "stable",
        "Mac": "stable",
        "Linux": "stable",
        "ChromeOS": "stable",
        "default": "",
      },
      origin_trial_feature_name: "LanguageDetectionAPI",
      origin_trial_allows_third_party: true,
      base_feature_status: "enabled",
      copied_from_base_feature_if: "overridden",
    },
    {
      name: "LanguageDetectionAPIForWorkers",
      public: true,
    },
    {
      name: "LayoutAddChildBeforeDescendantFix",
      status: "stable",
    },
    {
      // LayoutBox::PhysicalLocation() to return a truly visual offset - the
      // offset of its first fragment relatively to the first fragment of its
      // containing block, also when block-fragmented (used to be in the
      // "stitched" flow-thread coordinate space).
      name: "LayoutBoxVisualLocation",
      status: "stable",
    },
    {
      name: "LayoutFlexNewRowAlgorithm",
      status: "stable",
    },
    {
      name: "LayoutFlexNewStretch",
      status: "stable",
    },
    {
      name: "LayoutIgnoreMarginsForSticky",
    },
    {
      name: "LayoutIsAnonymousBlockFix",
      status: "stable",
    },
    {
      name: "LayoutMinSizeAutoIndefinite",
      status: "stable",
    },
    {
      name: "LayoutNewReplacedLogic",
      status: "stable",
    },
    {
      name: "LayoutNGShapeCache",
      status: "stable",
      base_feature: "LayoutNGShapeCache",
    },
    {
      name: "LayoutReplacedReturnExplicitDefaultNaturalSize",
    },
    {
      name: "LayoutStretch",
      status: "stable",
    },
    {
      name: "LayoutStretchCacheFix",
      status: "stable",
    },
    {
      name: "LazyInitializeMediaControls",
      base_feature: "none",
      public: true,
      // This is enabled by features::kLazyInitializeMediaControls.
    },
    {
      // If enabled, the lazy load image observer will use a scroll margin in
      // its init dictionary instead of a root margin.
      name: "LazyLoadScrollMargin",
      public: true,
      status: "stable",
    },
    {
      // If enabled, the lazy load iframe observer will use a scroll margin in
      // its init dictionary instead of a root margin.
      name: "LazyLoadScrollMarginIframe",
      public: true,
      status: "stable",
    },
     {
      name: "LimitThirdPartyCookies",
      origin_trial_feature_name: "LimitThirdPartyCookies",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "LineBreakEarlyReturn",
      status: "stable",
    },
    {
      name: "ListItemWithCounterSetNotSetExplicitValue",
      status: "stable",
    },
    {
      name: "ListOwnerMustHaveCSSBox",
      status: "stable",
    },
    {
      name: "LocalNetworkAccessPermissionPolicy",
      base_feature: "none",
      // No status because this blink runtime feature doesn't work by itself.
      // It's controlled by network::features::kLocalNetworkAccessChecks which
      // needs to be enabled to make the whole feature work (see
      // crbug.com/394009026).
    },
    {
      name: "LockedMode",
      status: "test",
      // Enabled by features::kLockedMode.
      public: true,
    },
    {
      // Enable sourceCharPosition for the invoke-type resolve-promise
      // https://issues.chromium.org/issues/381529126
      name: "LongAnimationFrameSourceCharPosition",
      status: "experimental",
    },
    {
      // Enable retrieving sourceLine and sourceColumn in LoAF implementation.
      // https://issues.chromium.org/issues/391417815
      name: "LongAnimationFrameSourceLineColumn",
      status: "test",
      implied_by: ["LongAnimationFrameSourceLineColumnInterface"],
    },
    {
      // Add sourceLine and sourceColumn to PerformanceScriptTiming
      // https://issues.chromium.org/issues/391417815
      name: "LongAnimationFrameSourceLineColumnInterface",
      status: "test",
    },
    {
      // Long press on a link selects the link text instead of bringing up
      // context menu. Enabled only on Android AuthView.
      name: "LongPressLinkSelectText",
    },
    {
      // Use LongAnimationFrameMonitor to emit longtask entries
      name: "LongTaskFromLongAnimationFrame",
      status: "test",
    },
    {
      name: "MacCharacterFallbackCache",
      status: "stable",
    },
    {
      name: "MacDisableCtrlHomeEnd",
      status: "stable",
    },
    {
      name: "MachineLearningNeuralNetwork",
      // Enabled by webnn::mojom::features::kWebMachineLearningNeuralNetwork.
      base_feature: "none",
    },
    {
      name: "ManagedConfiguration",
      status: "stable",
    },
    {
      name:"MeasureMemory",
      status:"stable",
    },
    {
      name: "MediaCapabilitiesEncodingInfo",
      status: "experimental",
    },
    {
      name: "MediaCapabilitiesSpatialAudio",
      status: "test",
    },
    {
      name: "MediaCapture",
      status: {"Android": "stable"},
    },
    {
      name: "MediaCaptureBackgroundBlur",
      origin_trial_feature_name: "MediaCaptureBackgroundBlur",
      status: "experimental",
      implied_by: ["MediaCaptureCameraControls"],
      base_feature: "none",
    },
    {
      name: "MediaCaptureCameraControls",
      status: "experimental",
    },
    {
      name: "MediaCaptureConfigurationChange",
      origin_trial_feature_name: "MediaCaptureBackgroundBlur",
      status: "experimental",
      implied_by: ["MediaCaptureBackgroundBlur"],
      base_feature: "none",
    },
    {
      name: "MediaCaptureVoiceIsolation",
      status: "experimental",
    },
    // Set to reflect the MediaCastOverlayButton feature.
    {
      name: "MediaCastOverlayButton",
      base_feature: "none",
      public: true,
    },
    {
      name: "MediaControlsExpandGesture",
      base_feature: "none",
      public: true,
    },
    {
      name: "MediaControlsOverlayPlayButton",
      public: true,
      settable_from_internals: true,
      status: {"Android": "stable"},
      base_feature: "none",
    },
    {
      name: "MediaElementVolumeGreaterThanOne",
    },
    // Set to reflect the kMediaEngagementBypassAutoplayPolicies feature.
    {
      name: "MediaEngagementBypassAutoplayPolicies",
      base_feature: "none",
      public: true,
    },
    {
      name: "MediaLatencyHint",
      status: "test",
    },
    {
      name: "MediaPlaybackWhileNotVisiblePermissionPolicy",
      status: "test",
      origin_trial_feature_name: "MediaPlaybackWhileNotVisiblePermissionPolicy",
    },
    {
      name: "MediaPreviewsOptOut",
      base_feature: "none",
      origin_trial_feature_name: "MediaPreviewsOptOutPersistent",
      origin_trial_allows_third_party: true,
    },
    {
      name: "MediaQueryNavigationControls",
    },
    {
      name: "MediaSession",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "MediaSessionChapterInformation",
      status: "stable",
    },
    {
      name: "MediaSessionEnterPictureInPicture",
      public: true,
      status: "stable",
    },
    {
      name: "MediaSourceExperimental",
      status: "experimental",
    },
    {
      name: "MediaSourceExtensionsForWebCodecs",
      status: "experimental",
      base_feature: "none",
      origin_trial_feature_name: "MediaSourceExtensionsForWebCodecs",
    },
    {
      name: "MediaSourceNewAbortAndDuration",
      status: "stable",
    },
    {
      name: "MediaStreamTrackTransfer",
      status: "test",
      base_feature: "none",
    },
    {
      name: "MediaStreamTrackWebSpeech",
      status: {
        "Linux": "stable",
        "Mac": "stable",
        "Win": "stable",
        "default": "experimental",
      },
    },
    {
      name: "MenuElements",
      status: "test",
    },
    {
      name: "MessagePortCloseEvent",
      status: "test",
    },
    // This is a killswitch for <meta http-equiv="refresh"> no
    // longer accepting fractions, landed around M125.
    // It can be removed in M127 if there are no problems.
    {
      name: "MetaRefreshNoFractional",
      status: "stable",
    },
    // This is enabled by default on Windows only. The only part that's
    // "experimental" is the support on other platforms.
    {
      name: "MiddleClickAutoscroll",
      status: "test",
    },
    // Killswitch for crbug.com/40062462 fix.
    {
      name: "MixedContentAutoupgradesUseIsMixedContentRestrictedInFrame",
      status: "stable",
    },
    {
      name: "MobileLayoutTheme",
    },
    {
      name: "ModifyParagraphCrossEditingoundary",
      status: "stable",
    },
    {
      name: "MojoJS",
      status: "test",
      is_protected_feature: true,
    },
    // MojoJSTest is used exclusively in testing environments, whereas MojoJS
    // may also be used elsewhere.
    {
      name: "MojoJSTest",
      status: "test",
      base_feature: "none",
      is_protected_feature: true,
    },
    // Move the selection to the last position in the list item. See
    // https://crbug.com/331841851
    {
      name: "MoveEndingSelectionToListChild",
      status: "stable",
    },
    {
      name: "MoveToParagraphStartOrEndSkipsNonEditable",
      status: "stable",
    },
    {
      name: "MulticolColumnWrapping",
      status: "experimental",
    },
    {
      name: "MultipleImportMaps",
      status: "stable",
    },
    {
      name: "MultiSelectDeselectWhenOnlyOption",
      status: "test",
    },
    {
      name: "NavigateEventCanTransition",
    },
    {
      name: "NavigateEventCommitBehavior",
      status: "experimental",
    },
    {
      name: "NavigateEventPopstateLimitations",
      status: "stable",
    },
    {
      name: "NavigateEventSourceElement",
      status: "stable",
    },
    {
      name: "NavigationId",
      status: "experimental",
      origin_trial_feature_name: "SoftNavigationHeuristics",
      implied_by: ["SoftNavigationHeuristics"],
    },
    {
      name: "NavigatorContentUtils",
      // Android does not yet support NavigatorContentUtils.
      status: {"Android": "", "default": "stable"},
    },
    {
      name: "NestedViewTransition",
      status: "experimental",
    },
    {
      name: "NetInfoConstantType",
    },
    {
      name: "NetInfoDownlinkMax",
      public: true,
      // Only Android, ChromeOS support NetInfo downlinkMax, type and ontypechange now
      status: {
        "Android": "stable",
        "ChromeOS": "stable",
        "default": "experimental",
      },
      base_feature: "none",
    },
    {
      // This is a killswitch for the behavior of Element::GetFocusableArea
      // on delegatesFocus shadow hosts. This flag can be removed in M127 if
      // things are stable.
      name: "NewGetFocusableAreaBehavior",
      status: "stable",
    },
    {
      // This turns off all font antialiasing for tests unless it is
      // explicitly required and enabled using the
      // "--enable-font-antialiasing" flag like in the case of
      // "virtual/text-antialias/" virtual test suite.
      // crbug.com/339041663
      name: "NoFontAntialiasing",
      status: "test",
    },
    {
      name: "NoIdleEncodingForWebTests",
      status: "test",
    },
    // Doesn't increase the end offset on getting the range for a new line
    // character. See https://crbug.com/326888905
    {
      name: "NoIncreasingEndOffsetOnSplittingTextNodes",
      status: "stable",
    },
    // Doesn't insert empty blockquotes on outdenting a blockquote. See
    // https://crbug.com/323960902
    {
      name: "NonEmptyBlockquotesOnOutdenting",
      status: "stable",
    },
    {
      // TODO(crbug.com/1426629): This feature enables the deprecated value
      // slider-vertical. Disable this feature to stop parsing or allowing these
      // values.
      // https://drafts.csswg.org/css-ui-4/#appearance-switching
      name: "NonStandardAppearanceValueSliderVertical",
      status: "stable",
    },
    {
      name: "NotificationConstructor",
      // Android won't be able to reliably support non-persistent notifications, the
      // intended behavior for which is in flux by itself.
      status: {"Android": "", "default": "stable"},
    },
    // NotificationContentImage is not available in all platforms
    // The Notification Center on Mac OS X does not support content images.
    {
      name: "NotificationContentImage",
      public: true,
      status: {"Mac": "test", "default": "stable"},
      base_feature: "none",
    },
    {
      name: "Notifications",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "NotificationTriggers",
      origin_trial_feature_name: "NotificationTriggers",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "NumberInputFullWidthChars",
      status: "stable",
    },
    {
      name: "ObservableAPI",
      status: "stable",
      public: true,
    },
    {
      name: "OffMainThreadCSSPaint",
      status: "stable",
    },
    {
      name: "OffscreenCanvasCommit",
      status: "experimental",
    },
    {
      name: "OffscreenCanvasGetContextAttributes",
      status: "stable",
    },
    {
      name: "OmitBlurEventOnElementRemoval",
      status: "test"
    },
    {
      name: "OnDeviceWebSpeechAvailable",
      status: "stable",
    },
    {
      // This flag makes the <option> element's label attribute render the
      // contents of the label attribute even if it is only whitespace in order
      // to match the spec and firefox. It also stops stripping/simplifying
      // whitespace when using the label attribute for rendering.
      // https://github.com/whatwg/html/issues/10955
      name: "OptionLabelAttributeWhitespace",
      status: "stable",
    },
    {
      name: "OrientationEvent",
      status: {"Android": "stable"},
    },
    {
      name: "OriginIsolationHeader",
      status: "stable",
      base_feature: "none",
    },
    {
      name: "OriginPolicy",
      status: "experimental",
    },

    // Define a sample API for testing integration with the Origin Trials
    // Framework. The sample API is used in both unit and web tests for the
    // Origin Trials Framework. Do not change this flag to stable, as it exists
    // solely to generate code used by the sample API implementation.
    {
      name: "OriginTrialsSampleAPI",
      base_feature: "none",
      origin_trial_feature_name: "Frobulate",
      public: true,
    },
    // As above. Do not change this flag to stable, as it exists solely to
    // generate code used by the origin trials sample API implementation.
    {
      name: "OriginTrialsSampleAPIBrowserReadWrite",
      base_feature: "none",
      origin_trial_feature_name: "FrobulateBrowserReadWrite",
      browser_process_read_write_access: true,
    },
    // As above. Do not change this flag to stable, as it exists solely to
    // generate code used by the origin trials sample API implementation.
    // TODO(yashard): Add tests for this feature.
    {
      name: "OriginTrialsSampleAPIDependent",
      depends_on: ["OriginTrialsSampleAPI"],
      base_feature: "none",
    },
    // As above. Do not change this flag to stable, as it exists solely to
    // generate code used by the origin trials sample API implementation.
    {
      name: "OriginTrialsSampleAPIDeprecation",
      base_feature: "none",
      origin_trial_feature_name: "FrobulateDeprecation",
      origin_trial_type: "deprecation",
      origin_trial_allows_insecure: true,
      public: true,
    },
    // As above. Do not change this flag to stable, as it exists solely to
    // generate code used by the origin trials sample API implementation.
    {
      name: "OriginTrialsSampleAPIExpiryGracePeriod",
      base_feature: "none",
      origin_trial_feature_name: "FrobulateExpiryGracePeriod",
    },
    // As above. Do not change this flag to stable, as it exists solely to
    // generate code used by the origin trials sample API implementation.
    {
      name: "OriginTrialsSampleAPIExpiryGracePeriodThirdParty",
      base_feature: "none",
      origin_trial_feature_name: "FrobulateExpiryGracePeriodThirdParty",
      origin_trial_allows_third_party: true,
    },
    // As above. Do not change this flag to stable, as it exists solely to
    // generate code used by the origin trials sample API implementation.
    {
      name: "OriginTrialsSampleAPIImplied",
      base_feature: "none",
      origin_trial_feature_name: "FrobulateImplied",
      implied_by: ["OriginTrialsSampleAPI", "OriginTrialsSampleAPIInvalidOS"],
    },
    // As above. Do not change this flag to stable, as it exists solely to
    // generate code used by the origin trials sample API implementation.
    {
      name: "OriginTrialsSampleAPIInvalidOS",
      base_feature: "none",
      origin_trial_feature_name: "FrobulateInvalidOS",
      origin_trial_os: ["invalid"],
    },
    // As above. Do not change this flag to stable, as it exists solely to
    // generate code used by the origin trials sample API implementation.
    {
      name: "OriginTrialsSampleAPINavigation",
      base_feature: "none",
      origin_trial_feature_name: "FrobulateNavigation",
    },
    // As above. Do not change this flag to stable, as it exists solely to
    // generate code used by the origin trials sample API implementation.
    {
      name: "OriginTrialsSampleAPIPersistentExpiryGracePeriod",
      base_feature: "none",
      origin_trial_feature_name: "FrobulatePersistentExpiryGracePeriod",
    },
    // As above. Do not change this flag to stable, as it exists solely to
    // generate code used by the origin trials sample API implementation.
    {
      name: "OriginTrialsSampleAPIPersistentFeature",
      base_feature: "none",
      origin_trial_feature_name: "FrobulatePersistent",
      origin_trial_allows_third_party: true,
    },
    // As above. Do not change this flag to stable, as it exists solely to
    // generate code used by the origin trials sample API implementation.
    {
      name: "OriginTrialsSampleAPIPersistentInvalidOS",
      base_feature: "none",
      origin_trial_feature_name: "FrobulatePersistentInvalidOS",
      origin_trial_allows_third_party: true,
      origin_trial_os: ["invalid"],
    },
    // As above. Do not change this flag to stable, as it exists solely to
    // generate code used by the origin trials sample API implementation.
    {
      name: "OriginTrialsSampleAPIPersistentThirdPartyDeprecationFeature",
      base_feature: "none",
      origin_trial_feature_name: "FrobulatePersistentThirdPartyDeprecation",
      origin_trial_allows_third_party: true,
      origin_trial_type: "deprecation",
    },
    // As above. Do not change this flag to stable, as it exists solely to
    // generate code used by the origin trials sample API implementation.
    {
      name: "OriginTrialsSampleAPIThirdParty",
      base_feature: "none",
      origin_trial_feature_name: "FrobulateThirdParty",
      origin_trial_allows_third_party: true,
    },
    {
      name: "OverscrollCustomization",
      status: "experimental",
    },
    {
      name: "PagePopup",
      // Android does not have support for PagePopup
      status: {"Android": "", "iOS": "", "default": "stable"},
    },
    {
      name: "PageRevealEvent",
      status: "stable",
    },
    {
      name: "PageSwapEvent",
      status: "stable",
    },
    {
      name: "PaintHighlightsForFirstLetter",
      status: "stable",
    },
    {
      name: "PaintHoldingForIframes",
      status: "stable",
    },
    {
      name: "PaintHoldingForLocalIframes",
      status: "stable",
    },
    // Kill switch.
    {
      name: "PaintLayerUpdateOptimizations",
      status: "stable",
    },
    {
      name: "PaintTimingMixin",
      status: "experimental",
    },
    {
      name: "PaintUnderInvalidationChecking",
      settable_from_internals: true,
    },
    {
      // PARAKEET ad serving runtime flag/JS API.
      name: "Parakeet",
      origin_trial_feature_name: "Parakeet",
    },
    {
      // Uses base::Time::FromUTCString() in ParseDate() instead of code from
      // ParseDateFromNullTerminatedCharacters() from date_math.cc.
      name: "ParseDateUsesBaseTimeFromUtcString",
      status: "stable",
    },
    {
      name: "PartialCompletionNotAllowedInMoveParagraphs",
      status: "stable",
    },
    {
      name: "PartitionedPopins",
      status: "experimental",
    },
    {
      name: "PartitionVisitedLinkDatabaseWithSelfLinks",
      status: {"iOS": "", "default": "stable"},
    },
    // This is to add an option to enable the Reveal button on password inputs while waiting ::reveal gets standardized.
    {
      name: "PasswordReveal",
    },
    {
      name: "PaymentApp",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      // https://chromestatus.com/feature/5198846820352000
      name: "PaymentLinkDetection",
      status: "experimental",
    },
    {
      name: "PaymentMethodChangeEvent",
      depends_on: ["PaymentRequest"],
      status: "stable",
    },
    // PaymentRequest is enabled by default on Android
    {
      name: "PaymentRequest",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "PerformanceManagerInstrumentation",
      base_feature: "none",
      public: true,
    },
    {
      // Enables performance.mark('mark_feature_usage'): crbug.com/1517170
      name: "PerformanceMarkFeatureUsage",
      status: "experimental"
    },
    {
      name: "PerformanceNavigateSystemEntropy",
    },
    {
      name: "PerformanceNavigationTimingConfidence",
      origin_trial_feature_name: "PerformanceNavigationTimingConfidence",
      status: "experimental",
    },
    {
      name: "PeriodicBackgroundSync",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "PerMethodCanMakePaymentQuota",
      origin_trial_feature_name: "PerMethodCanMakePaymentQuota",
      status: "experimental",
      base_feature: "none",
    },
    {
      // Tracking bug for the implementation: https://crbug.com/1462930
      name: "PermissionElement",
      origin_trial_feature_name: "PermissionElement",
      origin_trial_os: ["win", "mac", "linux", "fuchsia", "chromeos", "android"],
      status: "experimental",
      public: true,
      base_feature_status: "enabled",
      copied_from_base_feature_if: "overridden",
    },
    {
      // Tracking bug for the implementation: crbug.com/352249547
      // This flag adds having the option to show an icon in the Permission
      // element, if developers want to.
      // The flag will enable us to land the feature over multiple CLs, and will
      // be enabled after the feature has been fully implemented.
      name: "PermissionElementIcon",
      status: "stable",
      depends_on: ["PermissionElement"],
    },
    {
      name: "Permissions",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "PermissionsRequestRevoke",
      status: "experimental",
    },
    {
      // crbug.com/398955086
      name: "PlaceholderVisibility",
      status: "stable",
    },
    {
      // crbug.com/389726691.
      name: "PlainTextPainter",
      status: "stable",
    },
    // This is a reverse OT used for a phased deprecation.
    // https://crbug.com/918374
    {
      name: "PNaCl",
      base_feature: "none",
      origin_trial_feature_name: "PNaCl",
      public: true,
    },
    {
      name: "PointerEventDeviceId",
      status: "stable",
    },
    // Coalesced/predicted event targets in untrusted events.
    // See https://crbug.com/353538500
    {
      name: "PointerEventTargetsInEventLists",
      status: "stable",
    },
    {
      // Flag for enabling the pointer lock API on Android
      name: "PointerLockOnAndroid",
    },
    {
      name: "PositionOutsideTabSpanCheckSiblingNode",
      status: "stable",
    },
    {
      name: "PotentialPermissionsPolicyReporting",
      status: "stable",
    },
    {
      name: "PreciseMemoryInfo",
      base_feature: "none",
      public: true,
    },
    // Adds a web setting to disable CSS ScrollbarColor, ScrollbarWidth, and
    // legacy ::-webkit-scrollbar* pseudo-element styling.
    {
      name: "PreferDefaultScrollbarStyles",
    },
    // Prefer not using composited scrolling. Composited scrolling will still
    // be used if there are other reasons forcing compositing. For consistency,
    // any code calling Settings::GetPreferCompositingToLCDTextEnabled() should
    // ensure that this flag overrides the setting.
    {
      name: "PreferNonCompositedScrolling",
      settable_from_internals: true,
    },
    {
      name: "PreferredAudioOutputDevices",
      base_feature_status: "enabled",
      copied_from_base_feature_if: "overridden",
      origin_trial_feature_name: "PreferredAudioOutputDevices",
      origin_trial_allows_third_party: true,
      status: "experimental",
      public: true,
    },
    {
      name: "PrefersReducedData",
      status: "experimental",
    },
    {
      // Used to allow preloading data: URLs with link rel=preload.
      // https://crbug.com/348442535
      name: "PreloadLinkRelDataUrls",
      status: "experimental",
    },
    {
      // This flag changes the UA stylesheet to make some elements use
      // margin-block instead of margin-top/margin-bottom in order to match the
      // HTML spec and firefox. Shipping in M137.
      // https://issues.chromium.org/issues/407315792
      name: "PreLogicalMargin",
      status: "stable",
    },
    {
      // Used to allow chrome://flags to turn off prerendering. (Without using
      // the user-facing preloading settings page to turn off other
      // preloading.) See https://crbug.com/1494471.
      //
      // It also has some feature params defined throughout the codebase.
      name: "Prerender2",
      status: "stable",
    },
    {
      name: "Presentation",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      // When enabled, prevents undo to be applied if the enclosing block
      // is not editable
      name: "PreventUndoIfNotEditable",
      status: "stable"
    },
    {
      // Controls the aggregate error reporting feature, which allows for
      // contributions to be made conditional on error conditions that can be
      // hit when using the API. This also defers contribution merging and
      // modifies the budgeting flow.
      // https://chromestatus.com/feature/5194896325214208
      name: "PrivateAggregationApiErrorReporting",
      status: "experimental",
    },
    {
      // Controls whether Private Aggregation's "maxContributions" field is
      // enabled for Shared Storage callers. If disabled, the field will be
      // ignored. https://chromestatus.com/feature/5189366316793856
      name: "PrivateAggregationApiMaxContributions",
      status: "stable",
    },
    {
      name: "PrivateNetworkAccessNonSecureContextsAllowed",
      origin_trial_feature_name: "PrivateNetworkAccessNonSecureContextsAllowed",
      origin_trial_type: "deprecation",
      origin_trial_allows_insecure: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "PrivateNetworkAccessNullIpAddress",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "PrivateNetworkAccessPermissionPrompt",
      origin_trial_feature_name: "PrivateNetworkAccessPermissionPrompt",
      origin_trial_os: ["win", "mac", "linux", "fuchsia", "chromeos"],
      status: "stable",
      public: true,
      base_feature: "none",
    },
    {
      name: "PrivateStateTokens",
      status: "stable",
      base_feature: "none",
      public: true,
    },
    {
      // Always allow trust token issuance (so long as the base::Feature
      // is enabled). Used for testing; circumvents a runtime check that,
      // if this RuntimeEnabledFeature is not present, guarantees the origin
      // trial is enabled.
      name: "PrivateStateTokensAlwaysAllowIssuance",
      public: true,
      status: "test",
      base_feature: "none",
    },
    {
      // Propagate overscroll-behavior from the root element rather than the
      // body element. crbug.com/41453796
      name: "PropagateOverscrollBehaviorFromRoot",
      status: "experimental"
    },
    // Protected memory varariant of the sample API for testing integration with
    // the Origin Trials Framework. This is used only in unit tests.
    // Do not change this flag to stable, as it exists
    // solely to generate code used by the sample API implementation.
    {
      name: "ProtectedOriginTrialsSampleAPI",
      base_feature: "none",
      origin_trial_feature_name: "Frobulate",
      is_protected_feature: "true",
    },
    // As above. Do not change this flag to stable, as it exists solely to
    // generate code used by the origin trials sample API implementation.
    // TODO(yashard): Add tests for this feature.
    {
      name: "ProtectedOriginTrialsSampleAPIDependent",
      depends_on: ["ProtectedOriginTrialsSampleAPI"],
      base_feature: "none",
      is_protected_feature: "true",
    },
    // As above. Do not change this flag to stable, as it exists solely to
    // generate code used by the origin trials sample API implementation.
    {
      name: "ProtectedOriginTrialsSampleAPIImplied",
      base_feature: "none",
      origin_trial_feature_name: "FrobulateImplied",
      implied_by: ["ProtectedOriginTrialsSampleAPI"],
      is_protected_feature: "true",
    },
    {
      // Allowing pseudo-elements to have focus.
      name: "PseudoElementsFocusable",
      status: "stable",
    },
    {
      name: "PushMessageDataBytes",
      depends_on: ["PushMessaging"],
      status: "stable",
      base_feature: "none",
    },
    {
      name: "PushMessaging",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "PushMessagingSubscriptionChange",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      // ChromeStatus: https://chromestatus.com/feature/6194847180128256
      name: "QuotaExceededErrorUpdate",
      status: "stable",
    },
    {
     // crbug.com/323953913
     // Fix looking for next radio button in the form's scope. This was added
     // in M135 and can be removed after M138.
     name: "RadioInputNextButtonInScope",
     status: "stable",
    },
    {
      name: "RasterInducingScroll",
      status: {
        "Linux": "stable",
        "Win": "stable",
        "default": "test",
      }
    },
    {
      name: "ReadableStreamAsyncIterable",
      status: "stable",
    },
    {
      // Enables support for a 'min' option in ReadableStream BYOBReader.read(),
      // allowing callers to specify the minimum number of bytes to be read into
      // the buffer before resolving the read request.
      // https://chromestatus.com/feature/6396991665602560
      name: "ReadableStreamBYOBReaderReadMinOption",
      status: "experimental",
    },
    // If enabled, both Accept-Language HTTP header and JavaScript getter will
    // be reduced.
    {
      name: "ReduceAcceptLanguage",
      base_feature: "none",
    },
    {
      // If enabled, the screen sizes reported through the `Screen` interface
      // will be limited to the size of the viewport unless Window Management
      // permission has been granted.
      name: "ReduceScreenSize",
      settable_from_internals: true,
    },
    {
      // If enabled, the deviceModel will be reduced to "K" and the
      // androidVersion will be reduced to a static "10" string in android
      // User-Agent string.
      name: "ReduceUserAgentAndroidVersionDeviceModel",
      depends_on: ["ReduceUserAgentMinorVersion"],
      status: {"Android": "stable"},
    },
    // If enabled, the platform version in User-Agent Data will be removed.
    // This feature is limited to Linux only.
    {
      name: "ReduceUserAgentDataLinuxPlatformVersion",
      status: {"Linux": "experimental"},
    },
    // If enabled, the minor version of the User-Agent string will be reduced.
    // This User-Agent Reduction feature has been enabled starting from M101,
    // but we still keep this flag for future phase tests.
    {
      name: "ReduceUserAgentMinorVersion",
      status: "stable",
    },
    {
      // If enabled, the platform and oscpu of the User-Agent string will be
      // reduced.
      name: "ReduceUserAgentPlatformOsCpu",
      depends_on: ["ReduceUserAgentMinorVersion"],
      status: {"Android": "", "default": "stable"},
    },
    {
      // Killswitch M136.
      name: "ReferenceFilterOutputBounds",
      status: "stable",
    },
    {
      name: "RegionCapture",
      status: {"Android": "", "default": "stable"},
    },
    {
      name: "RelatedWebsitePartitionAPI",
      base_feature: "none",

      // No status because this blink runtime feature doesn't work by itself.
      // It's controlled by the corresponding Chromium feature,
      // net::features::kRelatedWebsitePartitionAPI, which needs to be
      // enabled to make the whole feature work.
    },
    {
      // This flag allows more characters to be accepted as valid names in the
      // createElement and attribute related DOM APIs.
      // https://github.com/whatwg/dom/pull/1079
      // http://crbug.com/40228234
      // https://chromestatus.com/feature/6278918763708416
      name: "RelaxDOMValidNames",
      status: "experimental",
    },
    {
      name: "RelOpenerBcgDependencyHint",
      status: "experimental",
    },
    {
      name: "RemotePlayback",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "RemotePlaybackBackend",
      settable_from_internals: true,
      status: {
        "Android": "stable",
        "Win": "stable",
        "Mac": "stable",
        "Linux": "stable",
        "default": "experimental"},
    },
    {
      // This feature acts as a kill switch for ISO-2022-JP auto-detection.
      // This will be shipped in M139, and it can be removed in M141.
      // See https://chromestatus.com/feature/6576566521561088.
      name: "RemoveCharsetAutoDetectionForISO2022JP",
      status: "stable",
    },
    {
      name: "RemoveDanglingMarkupInTarget",
      status: "stable",
    },
    {
      name: "RemoveDataUrlInSvgUse",
      status: "stable",
    },
    {
      // This feature was shipped in M138, so this flag can be removed in M140.
      // See https://issues.chromium.org/issues/415911524.
      name: "RemoveNodeDetermineNodeFullySelected",
      status: "stable",
    },
    {
      // See https://issues.chromium.org/issues/41474791
      name: "RemoveSelectionCanonicalizationInMoveParagraph",
      status: "stable",
    },
    {
      // See https://issues.chromium.org/issues/41311101
      name: "RemoveVisibleSelectionInDOMSelection",
      status: "test",
    },
    {
      // See https://github.com/whatwg/html/issues/11070
      // ChromeStatus: https://chromestatus.com/feature/5207202081800192
      name: "RenderBlockingFullFrameRate",
      copied_from_base_feature_if: "overridden",
      origin_trial_feature_name: "RenderBlockingFullFrameRate",
      status: "test",
    },
    {
      // See https://github.com/whatwg/html/issues/10034
      name: "RenderBlockingInlineModuleScript",
      status: "stable",
    },
    {
      name: "RenderBlockingStatus",
      status: "stable",
    },
    {
      // The renderpriority attribute feature.
      // https://github.com/WICG/display-locking/blob/main/explainers/update-rendering.md
      name: "RenderPriorityAttribute",
    },
    {
      // Allocates a render surface for 2D scale transforms, to prevent
      // composited pixel alignment issues. See
      // https://crbug.com/40084005
      name: "RenderSurfaceFor2DScaleTransform",
      status: "stable",
    },
    {
      name: "ReportEventTimingAtVisibilityChange",
      status: "stable",
    },
    {
      name: "ReportFirstFrameTimeAsRenderTime",
      status: "test",
    },
    {
      name: "ResolveVarStylesOnCopy",
      status: "stable",
    },
    {
      name: "ResourceTimingContentEncoding",
      status: "experimental",
    },
    {
      name: "ResourceTimingContentType",
      status: "experimental",
    },
    {
      name: "ResourceTimingFinalResponseHeadersStart",
      status: "stable",
    },
    {
      name: "ResourceTimingInitiator",
      status: "experimental",
    },
    {
      name: "ResourceTimingUseCORSForBodySizes",
      status: "test",
    },
    {
      name: "ResponsiveIframes",
      status: "test",
    },
    {
      name: "RestrictGamepadAccess",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "RestrictGetBoundingClientRectForHiddenSVGElements",
      status: "stable",
    },
    {
      name: "RestrictOwnAudio",
      status: "experimental",
    },
    {
      name: "RestrictTabFocusForHiddenSVGElements",
      status: "stable",
    },
    // Killswitch for retargeting drag events to UA shadow hosts.
    // Added in M139, can be removed in M141.
    {
      name: "RetargetDragEvents",
      status: "stable",
    },
    {
      // Kill-switch for crbug.com/414129878.
      // Added in M139, and it can be removed in M141.
      name: "RevealSelectionInIframe",
      status: "stable",
    },
    {
      // New behavior when line breaker rewinds floats. crbug.com/1499290
      name: "RewindFloats",
      status: "stable",
    },
    {
      // If enabled, makes the root scrollbars' foreground elements follow the
      // browser
      name: "RootScrollbarFollowsBrowserTheme",
      status: {"Linux": "test", "Win": "test"},
    },
    {
      name: "RoundScrollOffsets",
      status: "stable",
    },
    {
      name: "RtcAudioJitterBufferMaxPackets",
      origin_trial_feature_name: "RtcAudioJitterBufferMaxPackets",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "RTCDataChannelPriority",
      status: "experimental",
    },
    {
      name: "RTCEncodedFrameAudioLevel",
      status: "stable",
    },
    {
      name: "RTCEncodedFrameSetMetadata",
      status: "experimental",
      origin_trial_feature_name: "RTCEncodedFrameSetMetadata",
    },
    {
      name: "RTCEncodedFrameTimestamps",
      status: "stable",
    },
    {
      name: "RTCEncodedVideoFrameAdditionalMetadata",
      status: "experimental",
    },
    // Enables the use of jitterBufferTarget attribute in WebRTC.
    // Spec: https://w3c.github.io/webrtc-extensions/#dom-rtcrtpreceiver-jitterbuffertarget
    {
      name: "RTCJitterBufferTarget",
      status: "stable",
    },
    // Legacy callback-based getStats() has limited availability unless this
    // Deprecation Trial is enabled.
    // TODO(https://crbug.com/822696): Remove when origin trial ends.
    {
      name: "RTCLegacyCallbackBasedGetStats",
      origin_trial_feature_name: "RTCLegacyCallbackBasedGetStats",
      status: "experimental",
      base_feature: "none",
    },
    // Enables the use of |RTCRtpEncodingParameters.codec|
    {
      name: "RTCRtpEncodingParametersCodec",
      status: "stable",
    },
    {
      name: "RTCRtpScaleResolutionDownTo",
      status: "stable",
    },
    {
      name: "RTCRtpScriptTransform",
      status: "experimental",
    },
    {
      name: "RTCRtpTransport",
      status: "test",
    },
    {
      name: "RTCStatsRelativePacketArrivalDelay",
      origin_trial_feature_name: "RTCStatsRelativePacketArrivalDelay",
      status: "experimental",
      base_feature: "none",
    },
    // Enables the use of SVC scalability mode in WebRTC.
    // Spec: https://w3c.github.io/webrtc-svc/
    {
      name: "RTCSvcScalabilityMode",
      status: "stable",
    },
    {
      // crbug.com/394983447
      name: "RubyJustificationFix",
      status: "stable",
    },
    {
      // crbug.com/324111880
      name: "RubyShortHeuristics",
      status: "stable",
    },
    // This is a finch killswitch for a bug fix to the behavior of
    // node.setTextContent(). The fix landed in M135, and this flag can be
    // removed in M137 pending no issues.
    {
      name: "SameValueTextContentFiresMutationObservers",
      status: "stable",
    },
    {
      // Spec: https://wicg.github.io/sanitizer-api/
      // Tracking bug: crbug.com/356601280
      name: "SanitizerAPI",
      status: "test",
    },
    {
      name: "SchedulerYieldDisallowCrossFrameInheritance",
      status: "stable",
    },
    {
      // https://wicg.github.io/webcomponents/proposals/Scoped-Custom-Element-Registries
      // https://github.com/whatwg/html/issues/10854
      // Spec PRs:
      // https://github.com/whatwg/html/pull/10869
      // https://github.com/whatwg/dom/pull/1341
      name: "ScopedCustomElementRegistry",
    },
    {
      // https://github.com/WICG/view-transitions/blob/main/scoped-transitions.md
      name: "ScopedViewTransitions",
      status: "experimental"

    },
    // WebSpeech API with both speech recognition and synthesis functionality
    // is not fully enabled on all platforms.
    {
      name: "ScriptedSpeechRecognition",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "ScriptedSpeechSynthesis",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "ScriptRunIteratorCombiningMarks",
      status: "stable",
    },
    // Killswitch added in M134, as two flags
    // ScrollableAreasWithScrollNodeOptimization and UnifiedScrollableArea
    // before M137. We are keeping this flag for new optimizations and as a
    // finch holdback experiment feature.
    {
      name: "ScrollableAreaOptimization",
      status: "stable",
    },
    {
      name: "ScrollAnchorPriorityCandidateSubtree",
      status: "stable",
    },
    {
      name: "ScrollbarColor",
      status: "stable",
    },
    {
      name: "ScrollbarGutterFixedPosBugfix",
      status: "stable",
    },
    {
      name: "ScrollbarWidth",
      status: "stable",
    },
    // Killswitch added in M134, changed in M135.
    {
      name: "ScrollCullRectFromContainerRect",
      status: "stable",
    },
    {
      name: "ScrollEndEvents",
      status: "stable",
    },
    {
      name: "ScrollIntoViewNearest",
      status: "experimental"
    },
    // TODO(355460994): Remove after M129.
    // scroll into root frame didn't take scrollbar and borders into account,
    // while this is fixed, to avoid any web compat issues we have this killswitch.
    {
      name: "ScrollIntoViewRootFrameViewportBugFix",
      status: "stable",
    },
    // TODO(crbug.com/401443093): Remove after M141.
    {
      name: "ScrollIntoViewSelfScrollFix",
      status: "stable"
    },
    {
      // Separate flag for crbug.com/1426506 (getCurrentTime API change) which
      // is expected to land after the initial launch of ScrollTimeline.
      name: "ScrollTimelineCurrentTime",
      status: "experimental"
    },
    {
      // https://github.com/w3c/csswg-drafts/issues/9367#issuecomment-1854280461
      name: "ScrollTimelineNamedRangeScroll",
      status: "test",
    },
    // Implements documentElement.scrollTop/Left and bodyElement.scrollTop/Left
    // as per the spec, matching other Web engines.
    //
    // This flag can't be removed until the Android min SDK version is 28
    // (i.e., 'P') or later.  See AWSettings.setScrollTopLeftInteropEnabled
    // and its caller.
    {
      name: "ScrollTopLeftInterop",
      status: "stable",
    },
    // Allows CSS styling of browser search results.
    // https://issues.chromium.org/issues/339298411
    // https://chromestatus.com/feature/5195073796177920
    {
      name: "SearchTextHighlightPseudo",
      status: "experimental",
    },
    // SecurePaymentConfirmation has shipped on some platforms, but its
    // availability is controlled by the browser process (via the
    // SecurePaymentConfirmationBrowser feature), as it requires browser
    // support to function. See //content/public/common/content_features.cc
    //
    // The status is set to 'test' here to enable some WPT tests that only
    // require blink-side support to function.
    {
      name: "SecurePaymentConfirmation",
      public: true,
      status: "test",
      base_feature: "none",
    },
    {
      name: "SecurePaymentConfirmationAvailabilityAPI",
      status: "stable",
    },
    {
      name: "SecurePaymentConfirmationBrowserBoundKeys",
      status: "stable",
    },
    {
      name: "SecurePaymentConfirmationDebug",
      base_feature: "none",
      public: true,
    },
    {
      name: "SecurePaymentConfirmationNetworkAndIssuerIcons",
      status: "experimental",
    },
    {
      name: "SecurePaymentConfirmationOptOut",
      origin_trial_feature_name: "SecurePaymentConfirmationOptOut",
      origin_trial_allows_third_party: true,
      status: "stable",
      base_feature: "none",
    },
    {
      // Implements new UX for SPC including new output states, payment
      // instrument details and payment entities logos.
      name: "SecurePaymentConfirmationUxRefresh",
      status: "test",
    },
    {
      // Implements improved accessibility mappings for having an <input>
      // inside of a <select> by keeping the child <input> in the a11y tree at
      // the same place that its at in the DOM tree, but automatically setting
      // up a controls relationship to the menu list popup.
      name: "SelectAccessibilityNestedInput",
      status: "test",
      depends_on: ["CustomizableSelect"],
    },
    {
      // Implements improved accessibility mappings for having an <input>
      // inside of a <select> by reparenting the child <input> in the
      // accessibility tree to be a sibling of the menu list popup.
      name: "SelectAccessibilityReparentInput",
      status: "test",
      depends_on: ["CustomizableSelect"],
    },
    {
      // SelectAudioOutput API
      // https://chromestatus.com/feature/5164535504437248
      name: "SelectAudioOutput",
      status: {
        "Android": "",
        "default": "test",
      },
    },
    {
      // The selectedcontentelement attribute is for connecting select elements
      // to arbitrary <selectedcontent> elements.
      // https://github.com/openui/open-ui/issues/1063
      name: "SelectedcontentelementAttribute",
      status: "test",
      depends_on: ["CustomizableSelect"],
    },
    {
      // Implement Selection API across shadow DOM: direction and
      // getComposedRanges().
      // https://w3c.github.io/selection-api/#dom-selection-getcomposedranges
      // https://w3c.github.io/selection-api/#dom-selection-direction
      // This should ship in M137, and it can be removed after M139.
      name: "SelectionAcrossShadowDOM",
      status: "stable",
    },
    {
      // See https://crbug.com/417823377
      name: "SelectionDeleteFromDocumentUaShadowFix",
      status: "stable",
    },
    {
      // See https://crbug.com/395544401
      name: "SelectionUpdateToInitialSelectionInListify",
      status: "stable",
    },
    {
      // Killswitch M136.
      name: "SelectionVisibilityAfterPaint",
      status: "stable",
    },
    {
      // This flag is used to relax the rules used to slot elements into a
      // select with the multiple attribute or size >1. This could be enabled
      // in the case that SelectParserRelaxation causes a breaking change for
      // websites which were relying on the parser throwing away tags which
      // couldn't be slotted otherwise, like this:
      // <select multiple>
      //   <ul>
      //     <option>hello</option>
      // When the SelectParserRelaxation flag is removed, then this flag can be
      // safely removed as well.
      name: "SelectListBoxSlotAnything",
      depends_on: ["SelectParserRelaxation"],
    },
    {
      // If enabled, the select element will not dispatch a mouseup event when
      // an option is selected using the keyboard.
      // This should ship in M135, and it can be removed after M137.
      // http://crbug.com/396611142
      name: "SelectNoMouseUpForKeyboardSelection",
      status: "stable",
    },
    {
      // Makes the HTML parser allow most tags inside of <select> instead of
      // only <option>, <optgroup>, and <hr>.
      // https://github.com/whatwg/html/issues/10310
      name: "SelectParserRelaxation",
      status: "stable",
      public: true,
    },
    {
      // This is a feature used *only* for deprecation origin trial participants
      // to opt *out* of the SelectParserRelaxation new behavior. If this
      // feature is enabled, then SelectParserRelaxation will be disabled,
      // regardless of the state of that flag. This deprecation trial is
      // supported through M140, so this flag can be removed in M141+.
      name: "SelectParserRelaxationOptOut",
      origin_trial_feature_name: "SelectParserRelaxationOptOut",
      origin_trial_type: "deprecation",
      origin_trial_allows_third_party: true,
      origin_trial_allows_insecure: true,
      public: true,
    },
    {
      name: "SendBeaconThrowForBlobWithNonSimpleType",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "SensorExtraClasses",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "Serial",
      status: {"Android": "test", "default": "stable"},
      base_feature: "WebSerialAPI",
    },
    {
      // Kill-switch for crbug.com/40791925.
      // Added in M138, and it can be removed in M140.
      name: "SerializeCdataAsTextInHTMLDocuments",
      status: "stable",
    },
    {
      name: "SerializeViewTransitionStateInSPA",
    },
    {
      name: "SerialPortConnected",
      status: {"Android": "", "default": "experimental"},
      base_feature: "none",
    },
    {
      name: "ServiceWorkerClientLifecycleState",
      status: "experimental",
    },
    {
      // Support for Service Worker APIs in Dedicated Workers.
      // See https://chromestatus.com/feature/6497653025931264
      // See https://issues.chromium.org/issues/40364838
      name: "ServiceWorkerInDedicatedWorker",
    },
    {
      name: "ServiceWorkerStaticRouterTimingInfo",
      origin_trial_allows_third_party: true,
      origin_trial_feature_name: "ServiceWorkerStaticRouterTimingInfo",
    },
    {
      name: "SetSequentialFocusStartingPoint",
      status: "experimental",
    },
    {
      // Reference Target allows IDREF attributes to refer inside Shadow DOM.
      // crbug.com/346835896
      name: "ShadowRootReferenceTarget",
      status: "experimental",
      origin_trial_feature_name: "ShadowRootReferenceTarget"
    },
    {
      // If enabled, Reference Target will support aria-owns.
      // https://github.com/WICG/webcomponents/issues/1091
      name: "ShadowRootReferenceTargetAriaOwns",
    },
    {
      // crbug.com/329677645
      name: "ShapeResultCachedPreviousSafeToBreakOffset",
      status: "stable",
    },
    {
      name: "SharedArrayBuffer",
      base_feature: "none",
      public: true,
    },
    {
      name: "SharedArrayBufferUnrestrictedAccessAllowed",
      base_feature: "none",
      public: true,
    },
    {
      name: "SharedAutofill",
      public: true,
      status: "test",
      base_feature: "none",
    },
    {
      name: "SharedStorageAPI",
      base_feature: "none",
      public: true,
      status: "stable",
    },
    {
      name: "SharedStorageWebLocks",
      depends_on: ["SharedStorageAPI"],
      status: "stable",
    },
    {
      name: "SharedWorker",
      public: true,
      // Android does not yet support SharedWorker. crbug.com/154571
      status: {"Android": "", "default": "stable"},
      base_feature: "none",
    },
    {
      // If enabled, SharedWorker supports extendedLifetime
      // https://github.com/whatwg/html/issues/10997
      name: "SharedWorkerExtendedLifetime",
      status: "experimental",
      origin_trial_feature_name: "SharedWorkerExtendedLifetime",
      origin_trial_allows_third_party: true,
    },
    {
      name: "SignatureBasedInlineIntegrity",
      status: "experimental",
    },
    {
      name: "SignatureBasedIntegrity",
      status: "experimental",
      origin_trial_feature_name: "SignatureBasedIntegrity",
      origin_trial_allows_third_party: true,
    },
    {
      name: "SkipAd",
      depends_on: ["MediaSession"],
      status: "stable",
    },
    {
      // If enabled, only call ResourceLoadObserver callbacks if the DevTools
      // panel is open.
      name: "SkipCallbacksWhenDevToolsNotOpen",
      status: "experimental",
    },
    {
      name: "SkipLineBreakItemWhenIsCollapsed",
      status: "stable",
    },
    {
      // Skips the browser touch event filter, ensuring that events that reach
      // the queue and would otherwise be filtered out will instead be passed
      // onto the renderer compositor process as long as the page hasn't timed
      // out. If skip_filtering_process is browser_and_renderer, also skip the
      // renderer cc touch event filter, ensuring that events will be passed
      // onto the renderer main thread.
      name: "SkipTouchEventFilter",
      status: "stable",
    },
    // Fix for crbug.com/41393366
    {
      name: "SkipUnselectableContentInSerialization",
      status: "stable",
    },
    {
      name: "SmartCard",
      status: {"Android": "", "default": "test"},
    },
    {
      name: "SmartZoom",
      base_feature: "none",
      public: true,
      status: {"Android": "test"},
    },
    {
      name: "SmilAutoSuspendOnLag",
      status: "stable",
    },
    {
      // Used to enable the code for detecting soft navigations through task
      // attribution. Set to stable as this generates an enabled-by-default
      // base::Feature for a field-trial remote shutoff. Needs to be a runtime
      // feature so that the Soft Navigation Heuristics Origin Trial can depend
      // on it.
      name: "SoftNavigationDetection",
      status: "stable",
    },
    {
      name: "SoftNavigationDetectionAdvancedPaintAttribution",
      status: "experimental",
      depends_on: ["SoftNavigationDetection"],
    },
    {
      name: "SoftNavigationDetectionPrePaintBasedAttribution",
      depends_on: ["SoftNavigationDetection"],
    },
    {
      name: "SoftNavigationHeuristics",
      status: "experimental",
      origin_trial_allows_third_party: true,
      origin_trial_feature_name: "SoftNavigationHeuristics",
    },
    {
      // Whether spatial navigation should use cursor inheritance to exclude
      // nodes where cursor is inherited. Kill-switch that can be remove once
      // the change goes through a stable release.
      name: "SpatNavUsesCursorInheritance",
      status: "stable",
    },
    {
      name: "SpeakerSelection",
      status: "experimental",
    },
    // Enables spec-compliant suffix matching for JSON MIME types
    // (e.g., text/html+json, image/svg+json) by allowing *+json patterns.
    // https://chromestatus.com/feature/5470594816278528
    {
      name: "SpecCompliantJsonMimeTypes",
      status: "stable",
    },
    {
      name: "SpeculationRulesPrefetchWithSubresources",
    },
    {
      // Enables to run prerendering for new tabs (e.g., target="_blank").
      // See https://crbug.com/1350676.
      name: "SpeculationRulesTargetHint",
      origin_trial_feature_name: "SpeculationRulesTargetHint",
      base_feature: "Prerender2InNewTab",
      status: "stable",
      copied_from_base_feature_if: "overridden",
    },
    {
      name: "SplitTextNotCleanupDummySpans",
      status: "stable",
    },
    // Kill switch for change to unify image-set and srcset selection logic.
    {
      name: "SrcsetSelectionMatchesImageSet",
      status: "stable",
    },
    // Used as argument in attribute of stable-release functions/interfaces
    // where a runtime-enabled feature name is required for correct IDL syntax.
    // This is a global flag; do not change its status.
    {
      name: "StableBlinkFeatures",
      status: "stable",
      base_feature: "none",
    },
    // Killswitch for https://crbug.com/40915318
    {
      name: "StandardHistoryStateEmptyUrlHandling",
      status: "stable",
    },
    {
      // See https://github.com/w3c/csswg-drafts/issues/9398
      name: "StandardizedBrowserZoom",
      status: "stable",
      public: true,
    },
    {
      name: "StandardizedBrowserZoomOptOut",
      origin_trial_feature_name: "DisableStandardizedBrowserZoom",
      origin_trial_type: "deprecation",
      origin_trial_allows_insecure: true,
      origin_trial_allows_third_party: true,
    },
    {
      name: "StandardizedTimerClamping",
      status: "stable",
      public: true,
    },
    {
      name: "StorageBuckets",
      status: "stable",
    },
    {
      // Gates the `durability()` method on a storage bucket and the property in
      // the options struct.
      name: "StorageBucketsDurability",
      status: "experimental",
    },
    {
      // Gates the `locks()` method on a storage bucket.
      name: "StorageBucketsLocks",
      status: "experimental",
    },
    {
      name: "StrictMimeTypesForWorkers",
      status: "experimental",
    },
    {
      name: "StylusHandwriting",
      base_feature: "none",
    },
    {
      name: "SvgAnchorElementRelAttributes",
      status: "stable",
    },
    {
      // Feature for updating SVG presentation attribute style eagerly. This is
      // a kill switch in case we encounter issues with this optimization.
      name: "SvgEagerPresAttrStyleUpdate",
      status: "stable",
    },
    {
      // Enables loading of external SVG resource documents for the 'clip-path',
      // 'fill', 'stroke' and 'marker-*' properties.
      name: "SvgExternalResources",
      status: "stable",
    },
    {
      name: "SvgInlineRootPixelSnappingScaleAdjustment",
      status: "test",
    },
    {
      name: "SvgNoPixelSnappingScaleAdjustment",
      status: "stable",
    },
    {
      name: "SvgScriptElementAsyncAttribute",
      status: "experimental",
    },
    {
      name: "SvgTransformOnNestedSvgElement",
      status: "stable",
    },
    {
      name: "SvgUseInstancesAttributeSync",
      status: "stable"
    },
    {
      name: "SynthesizedKeyboardEventsForAccessibilityActions",
      status: "experimental",
    },
    {
      // This is used for emoji variation selectors support in system
      // fallback matching. This is a workaround solution that helps to
      // avoid incorrect font matching due to lack of cmap format 14
      // subtable in system emoji fonts on various platforms.
      // This should be eventually removed when the custom emoji font
      // is shipped with Chrome or when system emoji fonts will have
      // cmap format 14 subtable.
      name: "SystemFallbackEmojiVSSupport",
      status: "stable",
    },
    {
      name: "SystemWakeLock",
      status: "experimental",
    },
    {
      name: "TableIsAutoFixedLayout",
      status: "test",
    },
    // For unit tests.
    {
      // This is for testing copied_from_base_feature_if.
      // This is set in base/test/test_suite.cc.
      name: "TestBlinkFeatureDefault",
      base_feature_status: "enabled",
      copied_from_base_feature_if: "overridden",
    },

    {
      name: "TestFeature",
      base_feature: "none",
      browser_process_read_write_access: true,
    },
    // For unit tests.
    {
      name: "TestFeatureDependent",
      depends_on: ["TestFeatureImplied"],
      base_feature: "none",
    },
    // This is a feature used for testing what happens when an origin trial
    // feature has browser-process read/write access. It should never be used
    // in production code.
    {
      name: "TestFeatureForBrowserProcessReadWriteAccessOriginTrial",
      origin_trial_feature_name: "TestFeatureForBrowserProcessReadWriteAccessOriginTrial",
      base_feature: "none",
      browser_process_read_write_access: true,
    },
    // For unit tests.
    {
      name: "TestFeatureImplied",
      implied_by: ["TestFeature"],
      base_feature: "none",
    },
    // For unit tests.
    {
      name: "TestFeatureProtected",
      base_feature: "none",
      is_protected_feature: true,
    },
    // For unit tests.
    {
      name: "TestFeatureProtectedDependent",
      depends_on: ["TestFeatureProtectedImplied"],
      base_feature: "none",
      is_protected_feature: true,
    },
    // For unit tests.
    {
      name: "TestFeatureProtectedImplied",
      implied_by: ["TestFeatureProtected"],
      base_feature: "none",
      is_protected_feature: true,
    },
    // For unit tests.
    {
      name: "TestFeatureStable",
      status: "stable",
    },
    {
      // crbug.com/414858401
      name: "TextareaLineEndingsAsBr",
      status: "stable",
      depends_on: ["EditingFastRichReplace"],
    },
    {
      // crbug.com/414858401
      name: "TextareaMultipleIfcs",
      status: "stable",
      depends_on: ["FastSelectionSync", "TextareaLineEndingsAsBr"],
    },
    {
      // crbug.com/341564372
      name: "TextareaSplitText",
      status: "stable",
    },
    {
      // killswitch for fix in M137
      name: "TextareaStableResizing",
      status: "stable",
    },
    {
      name: "TextAutoSizingDisabledOnFlexbox",
      status: "stable",
    },
    {
      name: "TextDetector",
      status: "experimental",
    },
    {
      // crbug.com/325517313
      name: "TextDiffSplitFix",
      status: "stable",
    },
    {
      // crbug.com/368657256
      name: "TextEmphasisPositionAuto",
      status: "experimental",
    },
    {
      name: "TextFragmentAPI",
      status: "experimental",
    },
    {
      name: "TextFragmentIdentifiers",
      origin_trial_feature_name: "TextFragmentIdentifiers",
      public: true,
      status: "stable",
      base_feature: "TextFragmentAnchor",
    },
    {
      name: "TextFragmentTapOpensContextMenu",
      status: {"Android": "stable"},
    },
    {
      name: "TextMetricsBaselines",
      status: "stable",
    },
    // This feature is used to inform the renderer of a user bypass from the
    // browser process to disable third-party storage partitioning.
    {
      name: "ThirdPartyStoragePartitioningUserBypass",
      browser_process_read_write_access: true,
      base_feature: "none",
    },
    {
      name: "TimerThrottlingForBackgroundTabs",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "TimestampBasedCLSTracking",
      status: "experimental"
    },
    {
      name: "TimeZoneChangeEvent",
      status: "experimental",
    },
    {
      // Adds an "source" attribute to ToggleEvent which is set to the button
      // that invoked the element which the toggle event was fired on, if
      // appropriate.
      // https://issues.chromium.org/issues/408018828
      // https://github.com/whatwg/html/issues/9111
      name: "ToggleEventSource",
      status: "experimental",
    },
    {
      name: "TopicsAPI",
      base_feature: "none",
      public: true,
      status: "stable",
    },
    {
      name: "TopicsDocumentAPI",
      base_feature: "none",
      public: true,
      status: "stable",
    },
    {
      // This feature allows calling the Topics API via an image
      // attribute.
      name: "TopicsImgAPI",
      base_feature: "none",
      public: true,
      status: "experimental",
    },
    // This is a killswitch for the behavior where popover.showPopover() and
    // dialog.showModal() throw DOM exceptions if the document isn't active.
    // This landed in M132, and can be removed in M134.
    {
      name: "TopLayerInactiveDocumentExceptions",
      status: "stable",
    },
    {
      name: "TopLevelTpcd",
      origin_trial_feature_name: "TopLevelTpcd",
      origin_trial_type: "deprecation",
      status: "experimental",
      base_feature: "none",
    },
    // This feature allows touch dragging and a context menu to occur
    // simultaneously, with the assumption that the menu is non-modal.  Without
    // this feature, a long-press touch gesture can start either a drag or a
    // context-menu in Blink, not both (more precisely, a context menu is shown
    // only if a drag cannot be started).
    {
      name: "TouchDragAndContextMenu",
      implied_by: ["TouchDragOnShortPress"],
      base_feature: "none",
      public: true,
    },
    // This feature enables drag and drop using touch input devices. Replaces
    // the old "--enable-touch-drag-drop" and "--disable-touch-drag-drop"
    // switches.
    {
      name: "TouchDragAndDrop",
      base_feature: "none",
      public: true,
    },
    // This feature makes touch dragging to occur at the short-press gesture,
    // which occurs right before the long-press gesture.  This feature assumes
    // that TouchDragAndContextMenu is enabled.
    {
      name: "TouchDragOnShortPress",
    },
    // Many websites disable mouse support when touch APIs are available.  We'd
    // like to enable this always but can't until more websites fix this bug.
    // Chromium sets this conditionally (eg. based on the presence of a
    // touchscreen) in ApplyWebPreferences. "Touch events" themselves are always
    // enabled since they're a feature always supported by Chrome.
    {
      name: "TouchEventFeatureDetection",
      origin_trial_feature_name: "ForceTouchEventFeatureDetectionForInspector",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    // Set to reflect the kTouchTextEditingRedesign feature.
    {
      name: "TouchTextEditingRedesign",
      base_feature: "none",
    },
    {
      name: "Tpcd",
      origin_trial_feature_name: "Tpcd",
      origin_trial_allows_third_party: true,
      origin_trial_type: "deprecation",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "TransferableRTCDataChannel",
      status: "stable",
    },
    // This is conditionally set if the platform supports translation.
    {
      name: "TranslateService",
    },
    {
      name: "TranslationAPI",
      status: {
        "Win": "stable",
        "Mac": "stable",
        "Linux": "stable",
        "default": "",
      },
      origin_trial_feature_name: "TranslationAPI",
      origin_trial_allows_third_party: true,
      base_feature_status: "enabled",
      copied_from_base_feature_if: "overridden",
    },
    {
      name: "TranslationAPIForWorkers",
      public: true,
    },
    {
      // Traverse flat tree to find start and end of paragraph in delete
      // selection to handle slot distribution in details.
      // See https://crbug.com/413595949
      name: "TraverseFlatTreeToHandleSlots",
      status: "stable",
    },
    {
      // Ensures symbols are treated as word boundaries during traversal.
      // See https://crbug.com/40252642
      name: "TreatSymbolsAsWordBoundary",
      status: "stable",
    },
    {
      name: "TrustedTypeBeforePolicyCreationEvent",
      status: "experimental",
    },
    {
      name: "TrustedTypesFromLiteral",
      status: "experimental",
      base_feature: "none",
    },
    {
      // Adapt Trusted Types to its new spec, as part of HTML.
      // Tracking bug: 330516530
      name: "TrustedTypesHTML",
      status: "test",
    },
    {
      name: "TrustedTypesUseCodeLike",
      status: "experimental",
    },
    {
      name: "UnclosedFormControlIsInvalid",
      status: "experimental",
    },
    {
      name: "UnencodedDigest",
      status: "experimental",
      implied_by: ["SignatureBasedIntegrity"],
      // It's unclear whether we'll trial this feature separately from
      // `SignatureBasedIntegrity`, but we must specify an origin trial feature
      // name in order for the `implied_by` relationship above to function.
      origin_trial_feature_name: "UnencodedDigest"
    },
    {
      name: "UnexposedTaskIds",
    },
    // This is a kill switch for the unprefixed Web Speech API.
    {
      name: "UnprefixedSpeechRecognition",
      status: "stable",
    },
    {
      name: "UnrestrictedMeasureUserAgentSpecificMemory",
    },
    // This is a reverse OT used for a phased deprecation, on desktop
    // https://crbug.com/1071424
    {
      name: "UnrestrictedSharedArrayBuffer",
      base_feature: "none",
      origin_trial_feature_name: "UnrestrictedSharedArrayBuffer",
      origin_trial_os: ["win", "mac", "linux", "fuchsia", "chromeos"],
    },
    // Enables using policy-controlled feature "usb-unrestricted" to allow
    // isolated context to access protected USB interface classes and to
    // bypass the USB blocklist.
    {
      name: "UnrestrictedUsb",
      status: "stable",
      depends_on: ["WebUSB"],
    },
    // If enabled, notify the associated DisplayCutoutHost of changes in
    // complex safe area constraint usage on the page.
    // Only Android may make use of this feature currently.
    {
      name: "UpdateComplexSafaAreaConstraints",
      status: {
        "Android": "stable",
        "default": "",
      }
    },
    // Fix for https://crbug.com/41329214.
    {
      name: "UpdateSelectionOnNodeInsertion"
    },
    {
      name: "URLPatternCompareComponent",
      status: "experimental",
    },
    {
      name: "URLPatternGenerate",
      status: "experimental",
    },
    {
      name: "URLSearchParamsHasAndDeleteMultipleArgs",
      status: "stable",
    },
    {
      name: "UseBeginFramePresentationFeedback",
      status: {
        "ChromeOS": "stable",
      },
    },
    {
      // Android currently uses low-quality interpolation, while other platforms
      // default to medium-quality. This flag is for experimenting with changing
      // the value on Android. See: https://crbug.com/374315986.
      name: "UseLowQualityInterpolation",
      status: {
        "Android": "stable",
        "default": "",
      },
    },
    {
      // This flag uses the original DOM text for input when the password
      // echo is enabled to create the offset_map.
      name: "UseOriginalDomOffsetsForOffsetMap",
      status: "test",
    },
    {
      name: "UsePositionForPointInFlexibleBoxWithSingleChildElement",
      status: "stable",
    },
    {
      name: "UsePositionIfIsVisuallyEquivalentCandidate",
      status: "stable",
    },
    {
      name: "UserDefinedEntryPointTiming",
      status: "experimental",
    },
    {
      // Makes navigation APIs to use focus node for caret navigation instead
      // of selection start.
      // https://crbug.com/40658856
      name: "UseSelectionFocusNodeForCaretNavigation",
      status: "stable",
    },
    {
      // Fix for https://crbug.com/421314614
      name: "UseSelectionInDOMTreeAnchorInExtendSelection",
      status: "stable"
    },
    {
      name: "UseShadowHostStyleCheckEditable",
      status: "stable",
    },
    {
      // For invalidation set tracking, we build a map from style rules to
      // their containing sheets. When this flag is enabled, we use that same
      // map for the Selector Stats feature.
      name: "UseStyleRuleMapForSelectorStats",
      status: "stable",
    },
    {
      name: "UseUndoStepElementDispatchBeforeInput",
      status: "stable",
    },
    {
      name: "V8IdleTasks",
      base_feature: "none",
      public: true,
    },
    {
      // This is a performance improvement which has slight visual differences.
      // Enabled in M137. http://crbug.com/334963179
      name: "ValidationBubbleNoForcedLayout",
      status: "stable",
    },
    {
      name: "VideoAspectRatioNaturalDimension",
      status: "stable",
    },
    {
      // Whether a video element should automatically play fullscreen unless
      // 'playsinline' is set.
      name: "VideoAutoFullscreen",
      settable_from_internals: true,
    },
    {
      name: "VideoFrameMetadataBackgroundBlur",
      status: "experimental",
    },
    {
      name: "VideoFrameMetadataRtpTimestamp",
      status: "experimental",
    },
    {
      name: "VideoFullscreenOrientationLock",
    },
    {
      name: "VideoRotateToFullscreen",
    },
    {
      name: "VideoTrackGenerator",
      status: "test",
    },
    {
      name: "VideoTrackGeneratorInWindow",
      status: "test",
    },
    {
      name: "VideoTrackGeneratorInWorker",
    },
    {
      name: "ViewportHeightClientHintHeader",
      status: "stable",
    },
    {
      name: "ViewportSegments",
      status: "stable",
    },
    {
      name: "ViewTransitionLongCallbackTimeoutForTesting",
      status: "test",
    },
    {
      name: "ViewTransitionUpdateLifecycleBeforeReady",
      status: "stable",
    },
    {
      name: "VisibilityCollapseColumn",
    },
    {
      name: "VisualViewportOnScrollEnd",
      status: "stable",
    },
    {
      // The "WakeLock" feature was originally implied_by "ScreenWakeLock" and
      // "SystemWakeLock". The former was removed after being promoted to
      // stable, but we need to keep this feature around for code and IDLs that
      // should work with both screen and system wake locks.
      name: "WakeLock",
      status: "stable",
      implied_by: ["SystemWakeLock"],
    },
    {
      // When enabled, this will issue a warning to the console any time
      // rendering is forced withing content-visibility subtrees (both
      // content-visibility: auto and content-visibility: hidden).
      name: "WarnOnContentVisibilityRenderAccess",
    },
    {
      name: "WebAppInstallation",
      status: "experimental",
    },
    {
      name: "WebAppLaunchQueue",
      status: {"Android": "test", "default": "stable"},
      base_feature: "none",
    },
    {
      name: "WebAppScopeExtensions",
      origin_trial_feature_name: "WebAppScopeExtensions",
      origin_trial_os: ["win", "mac", "linux", "chromeos"],
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebAppTabStrip",
      status: {
        "ChromeOS": "stable",
        "default": "experimental"
      },
      base_feature: "DesktopPWAsTabStrip",
      base_feature_status: "enabled",
      copied_from_base_feature_if: "overridden",
    },
    {
      name: "WebAppTabStripCustomizations",
      status: {
        "ChromeOS": "stable",
        "default": "experimental"
      },
      base_feature: "DesktopPWAsTabStripCustomizations",
      base_feature_status: "enabled",
      copied_from_base_feature_if: "overridden",
    },
    {
      name: "WebAppTranslations",
      status: "experimental",
      base_feature: "WebAppEnableTranslations",
    },
    {
      // WebAssembly JS Promise Integration,
      // https://github.com/WebAssembly/js-promise-integration/blob/main/proposals/js-promise-integration
      name: "WebAssemblyJSPromiseIntegration",
      origin_trial_feature_name: "WebAssemblyJSPromiseIntegration",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebAssemblyJSStringBuiltins",
      origin_trial_feature_name: "WebAssemblyJSStringBuiltins",
      status: "stable",
    },
    {
      // https://chromestatus.com/feature/5077691662073856
      name: "WebAudioBypassOutputBuffering",
      status: {
        "Win": "stable",
        "ChromeOS": "stable",
        "Mac": "stable",
        "Linux": "stable",
      },
    },
    {
      // https://chromestatus.com/feature/5077691662073856
      // Allows an Enterprise Policy to override WebAudioBypassOutputBuffering
      name: "WebAudioBypassOutputBufferingOptOut",
      public: true,
    },
    // WebAuth is disabled on Android versions prior to N (7.0) due to lack of
    // supporting APIs, see runtime_features.cc.
    {
      name: "WebAuth",
      status: "stable",
    },
    // When enabled adds the authenticator attachment used for registration and
    // authentication to the public key credential response.
    {
      name: "WebAuthAuthenticatorAttachment",
      status: "test",
    },
    // Prototyping https://github.com/w3c/webauthn/issues/2144
    {
      name: "WebAuthenticationAmbient",
      status: "experimental",
      base_feature: "none",
      public: true,
    },
    // https://w3c.github.io/webauthn/#dom-publickeycredentialcreationoptions-attestationformats
    {
      name: "WebAuthenticationAttestationFormats",
      status: "experimental",
      origin_trial_feature_name: "WebAuthnAttestationFormats",
      origin_trial_os: ["android"],
      origin_trial_allows_third_party: true,
    },
    // Enables providing a URL to retrieve a WebAuthn challenge.
    // https://chromestatus.com/feature/5109012922892288
    {
      name: "WebAuthenticationChallengeUrl",
      status: "experimental",
    },
    // https://w3c.github.io/webauthn/#dom-clientcapability-conditionalcreate
    {
      name: "WebAuthenticationConditionalCreate",
      status: "test",
      base_feature: "none",
      public: true,
    },
    // Prototyping https://github.com/w3c/webauthn/issues/2228
    {
      name: "WebAuthenticationImmediateGet",
      origin_trial_feature_name: "WebAuthenticationImmediateGet",
      origin_trial_os: ["win", "mac", "linux", "chromeos"],
      base_feature: "none",
      public: true,
    },
    // Methods for deserializing WebAuthn requests from JSON/serializing
    // responses into JSON.
    // https://w3c.github.io/webauthn/#dom-publickeycredential-tojson
    // https://w3c.github.io/webauthn/#sctn-parseCreationOptionsFromJSON
    // https://w3c.github.io/webauthn/#sctn-parseRequestOptionsFromJSON
    {
      name: "WebAuthenticationJSONSerialization",
      status: "stable",
    },
    {
      name: "WebAuthenticationNewBfCacheHandlingBlink",
      // No status because this blink runtime feature doesn't work by itself.
      // It's controlled by the corresponding Chromium feature which needs to
      // be enabled to make the whole feature work.
    },
    // https://w3c.github.io/webauthn/#prf-extension
    {
      name: "WebAuthenticationPRF",
      status: "stable",
      base_feature: "WebAuthenticationPRFExtension",
    },
    {
      name: "WebAuthenticationRemoteDesktopSupport",
      base_feature: "none",
      public: true,
    },
    // https://w3c.github.io/webauthn/#sctn-supplemental-public-keys-extension
    {
      name: "WebAuthenticationSupplementalPubKeys",
      status: "experimental",
    },
    // WebBluetooth is enabled by default on Android, ChromeOS, iOS, macOS and
    // Windows.
    {
      name: "WebBluetooth",
      public: true,
      status: {
        "Android": "stable",
        "ChromeOS": "stable",
        "iOS": "stable",
        "Mac": "stable",
        "Win": "stable",
        "default": "experimental",
      },
      base_feature: "none",
    },
    {
      name: "WebBluetoothGetDevices",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebBluetoothScanning",
      status: "experimental",
    },
    {
      name: "WebBluetoothWatchAdvertisements",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebCodecsCopyToRGB",
      status: "stable",
    },
    {
      name: "WebCodecsHBDFormats",
      status: "stable",
    },
    {
      name: "WebCodecsOrientation",
      status: "stable",
    },
    {
      name: "WebCodecsVideoEncoderBuffers",
      status: "experimental",
    },
    {
      name: "WebCryptoCurve25519",
      status: "stable",
    },
    {
      name: "WebCryptoEd25519",
      status: "stable",
    },
    {
      name: "WebFontResizeLCP",
      status: "experimental",
    },
    {
      name: "WebGLDeveloperExtensions",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      // Draft WebGL extensions are deliberately not enabled by experimental web
      // platform features.
      name: "WebGLDraftExtensions",
      base_feature: "none",
      public: true,
    },
    {
      name: "WebGLDrawingBufferStorage",
      status: "stable",
    },
    {
      name: "WebGLImageChromium",
      base_feature: "none",
      public: true,
    },
    {
      // Switch WebGL to use an experimental implementation where WebGL calls
      // are translated in Blink, via ANGLE, to WebGPU calls. Note that this
      // is not marked as "experimental" because it is not an incremental
      // addition like other experimental features but a code switch, so we
      // don't want to enable it when testing all "experimental Web platform
      // features".
      name: "WebGLOnWebGPU",
    },
    {
      name: "WebGPUAdapterInfoIsFallbackAdapter",
      status: "stable",
    },
    {
      // Launch feature flag for WebGPU Compatibility Mode
      // https://chromestatus.com/feature/6436406437871616
      name: "WebGPUCompatibilityMode",
      origin_trial_feature_name: "WebGPUCompatibilityMode",
      status: "experimental",
      // Also enabled as part of all experimental WebGPU features.
      implied_by: ["WebGPUExperimentalFeatures"],
    },
    {
      name: "WebGPUCopyBufferToBufferOverload",
      status: "stable",
    },
    {
      // WebGPU developer features are deliberately not enabled by experimental
      // web platform features.
      name: "WebGPUDeveloperFeatures",
      base_feature: "none",
      public: true,
    },
    {
      // WebGPU experimental features are meant for features that would
      // eventually land in the WebGPU spec.
      name: "WebGPUExperimentalFeatures",
      status: "experimental",
      public: true,
    },
    {
      name: "WebHID",
      status: {"Android": "", "default": "stable"},
    },
    {
      // It is only enabled in extension environment for now.
      name: "WebHIDOnServiceWorkers",
      depends_on: ["WebHID"],
      base_feature: "none",
      public: true,
    },
    {
      name: "WebIdentityDigitalCredentials",
      origin_trial_feature_name: "WebIdentityDigitalCredentials",
      origin_trial_os: ["android", "win", "mac", "linux", "chromeos"],
      origin_trial_allows_third_party: true,
      implied_by: ["WebIdentityDigitalCredentialsCreation"],
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebIdentityDigitalCredentialsCreation",
      public: true,
      status: "test",
      base_feature: "none",
    },
    {
      // When enabled, the legacy format of the Digital Credentials request isn't
      // supported anymore, and only the modern format is supported.
      name: "WebIdentityDigitalCredentialsStopSupportingLegacyRequestFormat",
    },
    // Kill switch for making BigInt handling in WebIDL use ToBigInt.
    {
      name: "WebIDLBigIntUsesToBigInt",
      status: "stable",
    },
    {
      name: "WebNFC",
      public: true,
      status: {"Android": "stable", "iOS": "stable", "default": "test"},
      base_feature: "none",
    },
    {
      name: "WebOTP",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "WebOTPAssertionFeaturePolicy",
      depends_on: ["WebOTP"],
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      // https://wicg.github.io/web-preferences-api/
      name: "WebPreferences",
      status: "experimental",
    },
    {
      name: "WebPrinting",
      status: {"Android": "", "default": "test"},
    },
    // WebShare is enabled by default on Android (non-WebView), Win, ChromeOS, and Mac.
    // This is done in chrome/renderer/chrome_content_renderer_client.cc to prevent
    // making the API available to Linux and WebView. Ideally we would set the status
    // below to "stable" once we can do so without significant test expectation duplication.
    {
      name: "WebShare",
      public: true,
      status: "test",
    },
    {
      name: "WebSocketStream",
      status: "stable",
    },
    {
      name: "WebSpeechRecognitionContext",
      status: "experimental",
    },
    {
      name: "WebTransportCustomCertificates",
      origin_trial_feature_name: "WebTransportCustomCertificates",
      status: "stable",
      base_feature: "none",
    },
    {
      // Note: enabling this without setting WebTransportCongestionControl to
      // either BBRv1 or BBRv2 will produce poor bandwidth estimates.
      name: "WebTransportStats",
      status: "experimental",
      base_feature: "none",
    },
    {
      // Fetches the WebUI code cache from the resource bundle asynchronously
      // on a worker thread.
      name: "WebUIBundledCodeCacheAsyncFetch",
      status: "experimental",
    },
    {
      name: "WebUSB",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "WebUSBOnDedicatedWorkers",
      status: "stable",
      depends_on: ["WebUSB"],
    },
    {
      // It is only enabled in extension environment for now.
      name: "WebUSBOnServiceWorkers",
      depends_on: ["WebUSB"],
      base_feature: "none",
      public: true,
    },
    {
      name: "WebViewXRequestedWithDeprecation",
      origin_trial_feature_name: "WebViewXRequestedWithDeprecation",
      origin_trial_allows_insecure: true,
      origin_trial_allows_third_party: true,
      origin_trial_os: ["android"],
      origin_trial_type: "deprecation",
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebVTTRegions",
      status: "experimental",
    },
    {
      name: "WebXR",
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "WebXRDepthPerformance",
      depends_on: ["WebXR"],
      public: true,
      status: "stable",
    },
    {
      name: "WebXREnabledFeatures",
      depends_on: ["WebXR"],
      status: "stable",
    },
    {
      name: "WebXRFrameRate",
      depends_on: ["WebXR"],
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebXRFrontFacing",
      depends_on: ["WebXR"],
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebXRGPUBinding",
      depends_on: ["WebXR"],
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebXRHandInput",
      depends_on: ["WebXR"],
      public: true,
      status: "stable",
      base_feature: "none",
    },
    {
      name: "WebXRHitTestEntityTypes",
      depends_on: ["WebXR"],
      status: "experimental",
    },
    {
      name: "WebXRImageTracking",
      depends_on: ["WebXR"],
      origin_trial_feature_name: "WebXRImageTracking",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebXRLayers",
      depends_on: ["WebXR"],
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebXRLayersCommon",
      implied_by: ["WebXRLayers", "WebXRGPUBinding"],
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebXRPlaneDetection",
      depends_on: ["WebXR"],
      origin_trial_feature_name: "WebXRPlaneDetection",
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebXRPoseMotionData",
      depends_on: ["WebXR"],
      public: true,
      status: "experimental",
      base_feature: "none",
    },
    {
      name: "WebXRSpecParity",
      depends_on: ["WebXR"],
      public: true,
      status: "experimental",
    },
    {
      name: "WidthAndHeightAsPresentationAttributesOnNestedSvg",
      status: "experimental",
    },
    // If enabled, window.default[Ss]tatus will be supported. This is disabled
    // by default, and is here to allow this behavior to be re-enabled via Finch
    // in case of problems. This flag should be removed by Q1 2023, assuming
    // no problems are encountered.
    {
      name: "WindowDefaultStatus",
    },
    {
      name: "WindowOnMoveEvent",
      status: "experimental",
      implied_by: ["DesktopPWAsAdditionalWindowingControls"],
    },
    {
      name: "XMLSerializerConsistentDefaultNsDeclMatching",
      status: "test",
    },
    {
      // If enabled, the `getDisplayMedia()` family of APIs will ask for NV12
      // frames, which should trigger a zero-copy path in the tab capture code.
      name: "ZeroCopyTabCapture",
    }
  ],
}