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.

39.0

Firefox for Android Release

July 2, 2015

Version 39.0, first offered to Release channel users on July 2, 2015

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

New

Fixed

  • Improve performance for IPv6 fallback to IPv4

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

  • Various security fixes

Changed

  • Removed support for insecure SSLv3 for network communications

  • Sync now only uses the strongest TLS configuration available on your device
    (self-host documentation)

HTML5

  • Added support for CSS Scroll Snap Points

  • List-style-type now accepts a string value

  • Enable the Fetch API for network requests from dedicated, shared and service workers

  • Implemented <link rel="preconnect"> allowing anticipation of a future connection without revealing any information

  • Cascading of CSS transitions and animations now matches the current spec