A new beta release for Firefox 4.0 has arrived. I'm actually not interested on testing beta version, but since it has been added in testing/ by Pat, i think there must be something interesting with this beta release, since usually Pat never put beta version even on testing.
By looking at the Release Notes, i can see a lot of work has been integrated on this beta. I'm sure when the final version has been released later this year, browser share will change again as more and more people will go back to use Firefox. I think the most problematic matter for Firefox is about their performance. So far, Safari and Google Chrome has done a great job of working on their performance, but not to Firefox. When they are able to solve this problem, i think their market share will increase significantly.