See what’s new in Firefox!

Release Notes tell you what’s new in Firefox. As always, we welcome your feedback. You can also file a bug in Bugzilla or see the system requirements of this release.


Firefox for Android Release

March 18, 2014

Version 28.0, first offered to Release channel users on March 18, 2014

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

We'd also like extend a special thank you to all of the new Mozillians who contributed to Firefox 28!!


  • More native text selection, cut, and copy

  • Awesomebar entries now trigger predictive lookup

  • VP9 video decoding implemented

  • Estonian [et] locale added

  • Added support for OpenSearch

  • Added settings switch to toggle dynamic toolbar mode

  • Horizontal HTML5 audio/video volume control

  • Support for Opus in WebM



  • Now that spdy/3 is implemented support for spdy/2 has been removed and servers without spdy/3 will negotiate to http/1 without any penalty


  • Support for MathML 2.0 'mathvariant' attribute

  • Background thread hang reporting

  • Support for multi-line flexbox in layout

Developer Information


  • Crashes interacting with the back button on x86 tablets Galaxy Tab 3 10.1 (see 983211)

  • Moving Firefox to background while playing a flash video in full screen mode and bring it back to view will freeze the app (see 809055)

  • Some devices running Android 4.3/4.4 may experience playback problems with embedded h.264 video (see 984230)