This, as reported by Mozilla itself , aims to be the last beta before the RC is released , expected and again within a period of a couple of weeks.
Many changes and improvements in this beta 12. These include the improved performance to view Flash content and improving the compatibility of the plugins on the hardware acceleration .
The full list of updates you can read the page itself in Mozilla, and it will find things how are you:
- Best performance of the content Flash
- Better support for hardware acceleration
- Redesign of home page
- WebGL enabled by default in Linux
- Sync Firefox significant improvement
I'm testing and if you download it you only have to visit the download page Mozilla or go directly to the beta page where you will find more information as well as the above list of changes, known problems, etc