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const BgUtils = {
tabRecency: new TabRecency(),
// We're using browser.runtime to determine the browser name and version for Firefox. That API is
// only available on the background page. We're not using window.navigator because it's
// unreliable. Sometimes browser vendors will provide fake values, like when
// `privacy.resistFingerprinting` is enabled on `about:config` of Firefox.
isFirefox() {
// Only Firefox has a `browser` object defined.
return globalThis.browser
// We want this browser check to also cover Firefox variants, like LibreWolf. See #3773.
// We could also just check browserInfo.name against Firefox and Librewolf.
? browser.runtime.getURL("").startsWith("moz")
: false;
},
async getFirefoxVersion() {
return globalThis.browser ? (await browser.runtime.getBrowserInfo()).version : null;
},
};
BgUtils.tabRecency.init();
Object.assign(globalThis, {
BgUtils,
});
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