Firefox Beta Notes

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

Check out "What’s New" and "Known Issues" for this version of Firefox below. As always, you’re encouraged to tell us what you think, or file a bug in Bugzilla. If interested, please see the complete list of changes in this release.

What’s New

  • New

    Paste Android clipboard content into editable web content

  • New

    Support for 'switch' role in ARIA 1.1 (web accessibility)

  • Changed

    Removed support for insecure SSLv3 for network communications

  • Changed

    Disable use of RC4 except for temporarily whitelisted hosts

  • HTML5

    Enable the Fetch API by default

  • HTML5

    Vertical text mode enabled by default on Developer Edition

  • HTML5

    List-style-type now accepts a string value

  • HTML5

    Implement <link rel="preconnect">

  • HTML5

    Cascading of CSS transitions and animations now matches the current spec

  • HTML5

    Implement Cache API

  • HTML5

    Added support for CSS Scroll Snap Points

  • Fixed

    Improve performance for IPv6 fallback to IPv4

  • Fixed

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