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

April 11, 2016

Version 45.0.2, first offered to Release channel users on April 11, 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 a regression impacting some specific uploads (1255735)

  • Fix a crash impacting the video playback with Media Source Extension (1258562)

  • Fix a regression with the copy and paste with some old versions of some Gecko applications like Thunderbird (1254980)

  • Fix a web compatibility regression impacting the srcset attribute of the image tag (1259482)

  • Fix an issue impacting the cookie header when third-party cookies are blocked (1257861)

All Firefox downloads