Version History of Mozilla Firefox 27.0

What’s New

  • NEW  You can now run more than one service at a time with Firefox SocialAPI, allowing you to receive notifications, chat and more from multiple integrated services
  • CHANGED  Enabled TLS 1.1 (RFC 4346) and TLS 1.2 (RFC 5246) by default
  • CHANGED  Added support for SPDY 3.1 protocol
  • DEVELOPER  Ability to reset style sheets using 'all:unset'
  • DEVELOPER  You can now choose to deobfuscate javascript in the debugger (see 762761)
  • DEVELOPER  Added support for scrolled fieldsets (see 261037)
  • DEVELOPER  Implemented allow-popups directive for iframe sandbox, enabling increased security (see 766282)
  • DEVELOPER  CSS cursor keywords -moz-grab and -moz-grabbing have been unprefixed (see 880672)
  • DEVELOPER  Added support for ES6 generators in SpiderMonkey (see blog post)
  • DEVELOPER  Implemented support for mathematical function Math.hypot() in ES6 (see 896264)
  • HTML5  Dashed line support on Canvas (see 768067)
  • FIXED  Get Azure/Skia content rendering working on Linux (see 740200)
  • FIXED  27.0: Security fixes can be found here

Known Issues

  • UNRESOLVED  crash in gfxContext::PushClipsToDT with Direct2D 1.1 (d3d11.dll 6.2 or 6.3) (see 805406)
  • UNRESOLVED  Moving Firefox to background while playing a flash video in full screen mode and bring it back to view will freeze the app (see 809055)
  • UNRESOLVED  Text Rendering Issues on Windows 7 with Platform Update KB2670838 (MSIE 10 Prerequisite) or on Windows 8.1 has a workaround (see 812695)