• NEW - Firefox can now migrate your bookmarks, history, and cookies from Google Chrome
• NEW - With Sync enabled, add-ons can now be synchronized across your computers
• NEW - The CSS text-size-adjust property is now supported
• CHANGED - Redesigned media controls for HTML5 video
• HTML5 - The outerHTML property is now supported on HTML elements
• HTML5 - 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
• DEVELOPER - Web developers can now visualize a web page in 3D using the Page Inspector 3D View
• DEVELOPER - SPDY protocol support for faster page loads is now testable
• DEVELOPER - XMLHttpRequest now supports HTML parsing
• DEVELOPER - Files can now be stored in IndexedDB (see bug 661877)
• DEVELOPER - Websockets has now been unprefixed
• FIXED - Firefox notifications may not work properly with Growl 1.3 or later (691662)

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 - OS X: WebGL performance may be degraded on some hardware (see 713305)
• Unresolved on v11  Resolved in v12
• UNRESOLVED - Windows: The use of Microsoft's System Restore functionality shortly after updating Firefox may prevent future updates (see 730285)