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Firefox Release Notes (First offered to release channel users on April 24, 2012)

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.

If interested, please see the complete list of changes in this release.

What’s New

  • NEW
    Windows: Firefox is now easier to update with one less prompt (User Account Control)
  • NEW
    Page Source now has line numbers
  • CHANGED
    Line breaks are now supported in the title attribute
  • CHANGED
    Improvements to "Find in Page" to center search result
  • CHANGED
    URLs pasted into the download manager window are now automatically downloaded
  • DEVELOPER
    Support for the text-align-last CSS property has been added
  • FIXED
    Various security fixes
  • FIXED
    Some TinyMCE-based editors failed to load (739141)
  • FIXED
    OS X: WebGL performance may be degraded on some hardware (713305)

Known Issues

  • Unresolved
    If you try to start Firefox using a locked profile, it will crash (see 573369)
  • Unresolved
    For some users, scrolling in the main GMail window will be slower than usual (see 579260)
  • Unresolved
    Some synaptic touch pads are unable to vertical scroll (see 622410)
  • Unresolved
    Windows: The use of Microsoft's System Restore functionality shortly after updating Firefox may prevent future updates (see 730285)