Mozilla has released the latest beta of Firefox 4, and it crushes the previous versions in terms of performance.
This release boosts performance in some important ways: it adds the JägerMonkey just-in-time (JIT) JavaScript compiler; adds more support for hardware-accelerated graphics, as well as hardware acceleration for Windows XP and Mac OS X; and enables 3D capabilities, without the need for plug-ins, with WebGL.
It remains to be seen how this release stands up to current reigning speed champion, Google Chrome.
via The Mozilla Blog