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

January 6, 2016

Version 43.0.4, first offered to Release channel users on January 6, 2016

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


  • Fix for startup crash for users of a third party antivirus tool (Bug 1235537)

  • Multi-user GNU/Linux download folders can be created (Bug 1233434)


All Firefox downloads