* There are now over 100 add-ons for Firefox for Mobile, and counting.
Performance and Memory Usage
* Startup speed has improved visibly. This was a top request from Beta 3 users.
* Memory and CPU usage is reduced, making the browser more responsive and stable.
* Fixed several keyboard issues (top feedback from Beta 3)
* Improved support for tablets (like the Samsung Galaxy Tab) and small-screen devices (like the Motorola Droid Pro)
* Improved user interface for easy connection with desktop Firefox
* Added an option to resize text to fit the screen when you double-tap to zoom in, to optimize the reading experience. This feature can be activated in the Firefox preferences. (This is also based on top feedback from Beta 3 users.)
* Many miscellaneous bug fixes, usability improvements, and optimizations for a better experience