Version History of Firefox 28.0

What’s New

  • NEW  VP9 video decoding implemented
  • NEW  Mac OS X: Notification Center support for web notifications
  • NEW  Horizontal HTML5 audio/video volume control
  • NEW  Support for Opus in WebM
  • CHANGED  Now that spdy/3 is implemented support for spdy/2 has been removed and servers without spdy/3 will negotiate to http/1 without any penalty
  • DEVELOPER  Support for MathML 2.0 'mathvariant' attribute
  • DEVELOPER  Background thread hang reporting
  • DEVELOPER  Support for multi-line flexbox in layout
  • FIXED  Various security fixes

Known Issues

  • UNRESOLVED  Echo cancellation on fails (see 974537)
  • Unresolved on v28  Resolved in v29
  • UNRESOLVED  Text Rendering Issues on Windows 7 with Platform Update KB2670838 (MSIE 10 Prerequisite) or on Windows 8.1 has a workaround (see 812695)