In the meantime, there seems to be no end of good news about the winning open source browser, including the new IonMonkey just-in-time (JIT) compiler as well as speed improvements for those using Firefox on Linux. Firefox 4 also recently announced that it had surpassed 100 million downloads in its first month.
Will Firefox 4 win this round of the browser wars? Only time will tell. As of today, though, things are looking pretty good.