Improve your browsing experience with Mozilla's open-source and highly acclaimed Firefox.

Mozilla has switched Firefox to a rapid release development cycle which means new versions will come more frequently. The non-profit organization has promised to push out a new stable build every six weeks.

What's New:

• New
  • Firefox can now migrate your bookmarks, history, and cookies from Google Chrome
  • With Sync enabled, add-ons can now be synchronized across your computers
  • The CSS text-size-adjust property is now supported
• HTML
  • The outerHTML property is now supported on HTML elements
  • View source syntax highlighting now uses the HTML5 parser (see bug 482921)
• Developer
  • The Style Editor for CSS editing is now available to web developers
  • Web developers can now visualize a web page in 3D using the Page Inspector 3D View
  • SPDY protocol support for faster page loads is now testable
  • XMLHttpRequest now supports HTML parsing
  • Files can now be stored in IndexedDB (see bug 661877)
• Fixed
  • Websockets has now been unprefixed
  • Redesigned media controls for HTML5 video
  • Firefox notifications may not work properly with Growl 1.3 or later (691662)
• Known Issues
  • Two-digit browser version numbers may cause a small number of website incompatibilities (see 690287)
  • If you try to start Firefox using a locked profile, it will crash (see 573369)
  • For some users, scrolling in the main GMail window will be slower than usual (see 579260)
  • Some synaptic touch pads are unable to vertical scroll (see 622410)
  • Under certain conditions, scrolling and text input may be jerky (see 711900)

Please see the complete list of changes in this version. Web and extension developers should also view the curated list of platform changes. You may also be interested in the list of changes in the previous version.

More detailed release notes are available here.