Firefox 3.1 is currently in its second beta release, and it already looks great. In fact, it looks set to deliver a lot more than one might expect from a typical "minor" software-update release.
InaTux.com recently posted a good summary of some frequently-overlooked new features coming in Firefox 3.1. One of the most important of these under-the-hood tweaks will streamline Firefox's memory usage, allowing it to run faster and far more efficiently.
Firefox 3.0 already delivered major improvements in memory usage; most notably, it fixed a number of persistent, and often very annoying, memory-leak bugs. This time around, the changes in Firefox 3.1 will focus on the browser's normal memory usage, which according to this December, 2008 blog post already requires just two-thirds of the RAM that Firefox 3.0 requires for normal Web-browsing operations.