View notes for:

Firefox Beta Desktop Notes (First offered to Beta channel users on May 16, 2013)

Check out "What’s New" and "Known Issues" for this version of Firefox below. As always, you’re encouraged to tell us what you think, or file a bug in Bugzilla.

What’s New

  • NEW
    Windows: Firefox now follows display scaling options to render text larger on high-res displays
  • NEW
    WebRTC is now enabled by default!
  • NEW
    Mac OS X: Download progress in Dock application icon
  • NEW
    HTML5 audio/video playback rate can now be changed
  • NEW
    Social services management implemented in Add-ons Manager
  • NEW
    asm.js optimizations (OdinMonkey) enabled for major performance improvements
  • CHANGED
    Improved WebGL rendering performance through asynchronous canvas updates
  • CHANGED
    Plain text files displayed within Firefox will now word-wrap
  • CHANGED
    For user security, the |Components| object is no longer accessible from web content
  • CHANGED
    Improved memory usage and display time when rendering images
  • CHANGED
    Pointer Lock API can now be used outside of fullscreen
  • DEVELOPER
    CSS3 Flexbox implemented and enabled by default
  • DEVELOPER
    New Web Notifications API implemented
  • DEVELOPER
    Added clipboardData API for JavaScript access to a user's clipboard
  • DEVELOPER
    New built-in font inspector
  • HTML5
    New HTML5 <data> and <time> elements
  • FIXED
    Scrolling using some high-resolution-scroll aware touchpads feels slow (829952)

Known Issues

  • Unresolved
    If you try to start Firefox using a locked profile, it will crash (see 573369)
  • Unresolved
    Download statusbar add-on continues downloading files from Normal Browsing, when switching to Private Browsing (see 853463)