[opacity-change-twice-stacking-context.html]
  disabled:
    if webrender and (os == "linux"): https://bugzilla.mozilla.org/show_bug.cgi?id=1526468
  expected:
    if os == "mac": FAIL
    if webrender and (os == "win"): FAIL
    if (os == "android") and not e10s: FAIL
    if (os == "android") and e10s: PASS