After last week's release of Firefox 4 for desktops, the mobile version is now available, running on Android and Meego. The render engine of the desktop version is used, as well as Firefox Sync and plugin support. All in all Firefox 4 Mobile should be much faster than the Webkit-based browsers that are otherwise available on the Android platform. As usual, the open source browser is not available for iOS.
How many users will bet on the alternative browser is of course open - especially with smartphones there will be enough people who don't worry about such details and are happy if they can make calls. All others will get under Firefox.com/m an up-to-date browser for your mobile phone.