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.

Your system may not meet the requirements for Firefox, but you can try one of these versions:

Your system doesn't meet the requirements to run Firefox.

Your system doesn't meet the requirements to run Firefox.

Please follow these instructions to install Firefox.

Firefox Privacy Notice

31.3.0

Firefox ESR

December 1, 2014

Version 31.3.0, first offered to ESR channel users on December 1, 2014

Fixed

  • Security fixes can be found here

  • @ JS::Handle::operator JSObject* const&() startup crash (see bug 1055766 )

  • Intermittent failures in add-ons manager mochitest-browser tests (see bug 1095128 )

  • Bad CPU type in executable running mochitests on yosemite (see bug 1054043 )

  • Error building nsChildView.mm on OS X 10.10 (see bug 1005458 )

  • Build error on Yosemite (see bug 1045231 )

  • Wrong CPU features detection on some x86 CPUs (see bug 1096651 )

  • XMLHttpRequest.send({}) should not throw (see bug 1096263 )