Firefox 4 mobile has matured from Alpha to Beta1 and is now available for download. It is currently compatible with Android and Maemo. The application comes with popular features of its desktop version like Firefox Sync, Add-ons and the Awesome Bar. Firefox Sync allows users to sync browsing history, bookmarks, tabs, passwords and form-fill details between desktop and mobile browser.
Other features include Electrolysis, Layers and Pinch-to-zoom for multitouch devices. For complete specs, check Mozilla Blog. Currently supporting only Android and Maemo, wonder when Firefox4 will jump the App Store walled garden!