Firefox Developer Edition

July 3, 2015

Version 41.0a2, first offered to Firefox Developer Edition channel users on July 3, 2015


  • SVG images can be used as favicons



  • 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

  • View HTML source in a tab

  • 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

Web Platform

All Firefox Developer Edition downloads