After releasing the first beta version of Firefox 4 about three weeks ago, Mozilla have a new beta build ready for release. This new release packs over a dozen new features and is actually considered safe for day to day browsing tasks despite being a beta build.
The latest release brings the Mac OS X UI up to date with the Windows version – with all the tabs on top and new CSS3 goodness. Performance and startup time have also been improved significantly thanks to a rework on the XPCOM module. Scrolling and CSS3 animation performance would also see a boost thanks to a new Retained Layers system which can render and then cache the entire page in memory making itÂ unnecessaryÂ to repaint everything on every refresh.
I couldn’t get the Acid3 score on Firefox 4 Beta 2, because AcidTests.org was down at the time of writing. I’ll update the post with benchmark performance stats and the Acid3 score as soon as I can test that.
For now you can download Firefox 4 Beta 2 for Windows, Mac OS X, and Linux by following the link in the download box below.