Mozilla released the first public beta test of the mobile Firefox 4 edition for the Android and Maemo platforms, you can find all the details over here. This new release promises increased performance and responsiveness and includes Firefox Sync for a seamless experience between desktop and mobile.
Our first Firefox 4 beta for mobile is now available to download and test. It’s built on the same technology platform as Firefox for the desktop and optimized for browsing on a mobile phone. Firefox beta for mobile comes with many of your favorite Firefox desktop features like Firefox Sync, Add-ons and the Awesome Bar.
A major focus of this release is to increase performance and responsiveness. Two of the big architecture changes are Electrolysis and Layers. Our alpha contained Electrolysis which allowed the browser interface to run in a separate process from the one rendering Web content, resulting in a much more responsive browser. This beta brings the Layers pieces which improve overall performance and in graphics areas such as scrolling, zooming and animations.