Firefox 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 Release

November 10, 2014

Version 33.1, first offered to Release channel users on November 10, 2014

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



  • PDF.js: With some images, wrong colors could show up. Affects a very small number of PDF

  • Windows: Interface may be slow when typing or selecting text (1089183)

  • Windows: On some combination of hardware and drivers, some flickering can happen

All Firefox downloads