We have looked at the changes that Mozilla implemented in Firefox 16 when the Aurora channel was updated to the version, and it is a good idea to read through the article as it highlights the majority of changes of Firefox 16. The release notes for the beta version of Firefox 16 reveal the major changes in the new stable version of the browser. Probably most interesting from a user perspective is the incremental garbage collection that Mozilla integrated into Firefox 16.
This feature improves the browser’s responsiveness by dividing the work of the garbage collector into smaller pieces. Instead of running the garbage collector for hundreds of milliseconds at a time, the new technology runs it in ten millisecond intervals which do not affect the browser’s responsiveness anymore. If you have noticed lag when moving the mouse for instance from time to time, you may now experience a smoother experience thanks to the incremental nature of the garbage control algorithm.
The remaining features may appeal to a smaller part of the browser’s audience, but are for the most part not that interesting:
- Firefox on Mac OS X now has preliminary VoiceOver support turned on by default
- Initial web app support (Windows/Mac/Linux)
- Acholi localization added
- 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
- CSS3 Animations, Transitions, Transforms and Gradients unprefixed in Firefox 16
- Recently opened files list in Scratchpad implemented
- Debugger breakpoints do not catch on page reload (783393)
- No longer supporting MD5 as a hash algorithm in digital signatures (650355)
- Opus support by default (772341)
- Reverse animation direction has been implemented (655920)
- Per tab reporting in about:memory (687724)
- User Agent strings for pre-release Firefox versions now show only major version (728831)
Some features that were expected to land in Firefox 16 have not made it into the browser. This includes the panel based downloader which has been moved to Firefox 18, and the speedy session restore feature.
Source: http://www.ghacks.net/2012/10/08/firefox-16-0-whats-new/