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.

42.0beta

Firefox Beta

September 23, 2015

Version 42.0beta, first offered to Beta channel users on September 23, 2015

New

  • Private Browsing with Tracking Protection blocks certain Web elements that could be used to record your behavior across sites

  • Control Center that contains site security and privacy controls

  • Indicator added to tabs that play audio with one-click muting

  • Login Manager improvements:

    • Improved heuristics to save usernames and passwords
    • Edit and show all logins in line, Copy/Paste usernames/passwords from the Context menu
    • Migration imports your passwords to Firefox from Google Chrome for Windows and Internet Explorer; import anytime from the Login Manager
  • WebRTC improvements:

    • IPV6 support
    • Preferences for controlling ICE candidate generation and IP exposure
    • Hooks for extensions to allow/deny createOffer/Answer
    • Improved ability for applications to monitor and control which devices are used in getUserMedia

Changed

  • Improved performance on interactive websites that trigger a lot of restyles

Developer

Developer Information

HTML5

unresolved

  • URLs containing a Unicode-format Internationalized Domain Name (IDN) are not redirected properly, leading to a Server Not Found error.