Firefox Release

September 22, 2015

Version 41.0, first offered to Release channel users on September 22, 2015

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


  • SVG images can be used as favicons

  • Enhance IME support on Windows (Vista +) using TSF (Text Services Framework)

  • Ability to set a profile picture for your Firefox Account

  • Firefox Hello now includes instant messaging

  • Improved box-shadow rendering performance


  • Picture element does not react to resize/viewport changes

  • Various security fixes


  • WebRTC now requires perfect forward secrecy

  • Updates to image decoding process

  • WARP is disabled on Windows 7

  • Support for running animations of 'transform' and 'opacity' on the compositor thread


  • Developer Information
  • Removed support for binary XPCOM components in extensions, use addon SDK "system/child_process" pipe mechanism for native binaries instead

  • Network requests can be exported in HAR format

  • Quickly add new CSS rule with New Rule button in the Inspector

  • Screenshot a node or element from markup view with the Screenshot Node context menu item

  • Copy element CSS rule declarations with the Copy Rule Declaration context menu item in the Inspector

  • Pseudo-Class panel in the Inspector

Web Platform

All Firefox downloads