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.

Firefox Beta — English (US)

Firefox Privacy Notice

39.0beta

Firefox for Android Beta

May 28, 2015

Version 39.0beta, first offered to Beta channel users on May 28, 2015

New

Fixed

  • Improve performance for IPv6 fallback to IPv4

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

Changed

  • Removed support for insecure SSLv3 for network communications

Web Platform