Mozilla pushed the Firefox 16.0 into release channel today. Firefox on Mac OS X now has preliminary VoiceOver support turned on by default and initial web app support for Windows, Mac and Linux platforms. You can read more about web app support here.
New Developer Toolbar with buttons for quick access to tools, error count for the Web Console, and a new command line for quick keyboard access, Mozilla also improved the JavaScript responsiveness through incremental garbage collection. Per tab reporting memory is available in about:memory
Mozilla removed the prefixes for stable CSS3 Animations, Transitions, Transforms and Gradients in Firefox 16.0.
Download Firefox 16.0