View notes for:

Firefox Notes (First offered to release channel users on September 10, 2012)

Check out "What’s New" and "Known Issues" for this version of Firefox for mobile below. As always, you’re encouraged to tell us what you think, or file a bug in Bugzilla.

If interested, please see the complete list of changes in this release.

What’s New

  • FIXED
    Holding backspace causes enormous repeats of content (780543)
  • NEW
    Native UI for tablets, including faster startup and a beautiful new Awesome Bar!
  • NEW
    Enhanced Search in the Firefox Awesomebar (blog post
  • NEW
    Even better tabs experience - now includes swipe to close
  • NEW
    Bookmarks and history can now be imported from the stock browser in the Settings
  • NEW
    Desktop sites can now be requested from the menu
  • NEW
    Find in page implemented
  • NEW
    Support for SPDY networking protocol v3
  • CHANGED
    Pause, resume, cancel, and retry options added to the download manager
  • CHANGED
    Specific types of private data can now be cleared from the Settings
  • DEVELOPER
    High precision event timer implemented
  • DEVELOPER
    The CSS word-break property has been implemented.
  • HTML5
    Native support for the Opus audio codec added
  • HTML5
    The <audio> and <video> elements now support the played attribute
  • HTML5
    The <source> element now supports the media attribute
  • FIXED
    Basic support for text selection in web content (static text areas) (695173)
  • FIXED
    Copy/paste functionality restored (770928)
  • FIXED
    Forms are not yet fully functional (705201)
  • FIXED
    WebGL on Adreno devices is not currently supported (736123)
  • FIXED
    Quick black screen flash on startup with 4.1 (Jelly Bean) (770047)

Known Issues

  • Unresolved
    Kyocera Echo temporarily de-supported due to stability issues (see 784757)
    Unresolved on v15 Resolved in v16
  • Unresolved
    Some recent changes in the Google layout and CSS may cause issues in non-webkit browsers like Firefox (see 668288)
  • Unresolved
    Firefox for Android uses the same locale as your system language settings (see 695565)
  • Unresolved
    Font inflation my sometimes render inconsistent font sizes on certain pages (see 707195)
  • Unresolved
    Changing the device orientation may sometimes yield unexpected behavior (see 740691)
  • Unresolved
    Firefox Sync will not behave as expected if multiple Firefox channels are installed on a single device (see 761206)
  • Unresolved
    Holding backspace may delete text both in front of and behind the cursor (see 770291)