For Firefox 3 Mozilla Releases Beta 4

It was only in February that beta 3 for Firefox 3 was released, and now Mozilla is out with a new and improved beta 4 for the browser. The beta 4 version, like last time, is aimed at Web developers and testers to generate feedback and betterments in order to take a step further towards the final version of Firefox 3. Firefox 3 beta 4 claims to have nearly 900 enhancements over the last beta -- in terms of performance, stability, user interface, etc. For instance, the download manager in beta 4 promises to make it easier to locate downloaded files; also where the download originated and other information around it. Another new feature promises to allow users to zoom in and out on pages through keyboard shortcuts. Performance-wise, beta 4 is claimed to be able to make Web applications like Google Mail and Zoho Office run twice as fast as in Firefox 2.0. Besides, it's claimed to hog less memory.

And while it was earlier thought that this would be the final beta release before final release of Firefox 3, there's a reported beta 5 in the works. And that's not all, code freeze for beta 5 will likely be on Tuesday, March 18th, 2008.Source