Is Firefox 4 Mobile so fast that it could beat a browser running on PC hardware?
It is the freshest browser you can use on those phones at this time - it not only comes with a clever interface to get the most out of a 3.5-inch screen, but also some advanced features such as a syncing option between your phone and a PC (at least as far as information such as browsing history and bookmarks are concerned.)
In fact, our Firefox 4 Mobile scored a Sunspider time of 3375 ms on an 800 MHz G2 Android phone, which is quite stunning. IE8 required 4679 ms on a Phenom II-X6 based hexacore PC, which may be a sign how outdated IE8 really is. However, if you are using Firefox 4 Mobile, keep in mind that the browser has some disadvantages as well: Compared to the standard Android browser, Firefox 4 Mobile does not support Flash.