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NEW
Click-to-play blocklisting implemented to prevent vulnerable plugin versions from running without the user's permission (see blog post)
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NEW
Mac OS X 10.8: Support for Notification Center
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CHANGED
Updated Awesome Bar experience with larger icons
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DEVELOPER
JavaScript Maps and Sets are now iterable
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DEVELOPER
SVG FillPaint and StrokePaint implemented
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DEVELOPER
Improvements that make the Web Console, Debugger and Developer Toolbar faster and easier to use
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DEVELOPER
New Markup panel in the Page Inspector allows easy editing of the DOM
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HTML5
Sandbox attribute for iframes implemented, enabling increased security
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FIXED
Over twenty performance improvements, including fixes around the New Tab page
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FIXED
Pointer lock doesn't work in web apps (769150)
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FIXED
Page scrolling on sites with fixed headers (780345)
What’s New
Known Issues
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Unresolved
If you try to start Firefox using a locked profile, it will crash (see 573369)
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Unresolved
For some users, scrolling in the main GMail window will be slower than usual (see 579260)
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Unresolved
Windows: The use of Microsoft's System Restore functionality shortly after updating Firefox may prevent future updates (see 730285)