Firefox for Android
Release Notes

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

October 13, 2014

Version 33.0, first offered to Release channel users on October 13, 2014

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


  • Sending videos to Chromecast and Roku devices

  • Option added to clear data when quitting

  • Enhanced tab management:

    • Undo a closed tab
    • List recently closed tabs
    • Close all tabs at once
    • Quick switch-to-tab option when opening a new or private tab
  • Slimmer and faster JavaScript strings

  • New CSP (Content Security Policy) backend

  • Form elements updated to a more modern look

  • Locales added: Aragonese [an], Frisian [fy-NL], Kazakh [kk] and Khmer [km]



Web Platform


  • Fix incomplete downloads being marked as complete by detecting broken HTTP1.1 transfers (237623)

  • MP4 videos will not play on Android L

  • Flash does not work on Android L

  • On Gingerbread, VP9/WEBM video artifacts: only plays on half screen

  • Some certificate errors cannot be overridden (1042889)

Get the most recent version

All Firefox for Android downloads