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.

Your system may not meet the requirements for Firefox, but you can try one of these versions:

Your system doesn't meet the requirements to run Firefox.

Your system doesn't meet the requirements to run Firefox.

Please follow these instructions to install Firefox.

Firefox Privacy Notice


Firefox Beta

November 3, 2015

Version 43.0beta, first offered to Beta channel users on November 3, 2015


  • Private Browsing with Tracking Protection offers choice of blocking additional trackers

  • Improved API support for m4v video playback

  • Users can choose search suggestions from the Awesome Bar

  • On-screen keyboard displayed on selecting input field on devices running Windows 8 or greater

  • WebRTC streaming on multiple monitors

  • Improved Big5 support for Hong Kong supplementary characters on Windows XP

  • GTK3 integration (GNU/Linux only)


  • Eyedropper tool does not work as expected when page is zoomed


Developer Information