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Firefox Beta Desktop Notes (First offered to Beta channel users on April 4, 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
    Enhanced three-state UI for Do Not Track (DNT)
  • NEW
    Firefox will suggest how to improve your application startup time if needed
  • NEW
    Preliminary implementation of Firefox Health Report (see FAQ)
  • CHANGED
    Ability to Restore removed thumbnails on New tab Page
  • CHANGED
    Add-ons History API removals in Places
  • CHANGED
    CSS -moz-user-select:none selection changed to improve compatibility with -webkit-user-select:none (bugs 816298)
  • CHANGED
    Graphics related performance improvements (bugs 809821)
  • CHANGED
    Removed E4X support from SpiderMonkey
  • DEVELOPER
    Implemented Remote Profiling
  • DEVELOPER
    Integrated, Add-on SDK loader and API libraries into Firefox
  • HTML5
    Added support for <main> element
  • HTML5
    Implemented scoped stylesheets
  • FIXED
    Some function keys may not work when pressed (833719)
  • FIXED
    Browsing and Download history clearing needs unification to avoid confusion on clearing download history (847627)

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)