Linux.com: ” Mozilla has publicized beta releases of the desktop version of Firefox 4 since July, but mobile users can test out the next major update to the mobile browser as well. Firefox 4 for Mobile is officially at beta 1, with builds available for devices running Android and Nokia’s Maemo operating system.
The beta release was announced on October 7, along with a note that from this release onward, Firefox for Mobile would use the same version-numbering scheme as the desktop application, to avoid confusion.
Mobile users are encouraged to grab the actual download from their target devices, by visiting the short URL firefox.com/m/beta. Those who are already running the existing Firefox for Mobile client (version 1.1) should visit the download site with their device’s system browser — and beware of data charges if attempting the download over a mobile network; the browser package weighs in at 12MB for Android and 13MB for Maemo. The package expands to consume approximately 40MB of disk storage (although Mozilla assures users it will eventually whittle that number down by 50%)
Getting the Code
A thread at the Maemo forum logs trouble that some users have encountered with the update process; the N900′s Application Manager seems to reject the beta package as coming from a different domain than the Apt repository that provides it. The fix is to download the .deb package directly and install it.
Officially, only a subset of the generally-available Android phones are supported, and only the N900 phone is supported on the Maemo side. However, several Maemo users report being able to run the browser on older Maemo platforms, such as the N800 and N810 tablets. Unsupported nightly builds are available for additional Android devices, linked to from the system requirements page. In addition, Mozilla makes binary desktop builds available for Linux, Mac OS X, and Windows, so that add-on developers can test for compatibility and Web designers can test site rendering.
Mozilla’s Firefox Home app for iOS is still available, which uses Mozilla’s Firefox Sync service to synchronize iOS’s native browser with the user’s existing Firefox bookmarks, tabs, and history. Symbian and Palm’s webOS are similarly unsupported, although third-party efforts to port Firefox to them have been undertaken in the past.”