From Information Week

Browser speeds page loading and graphics and includes JagerMonkey compiler to boost JavaScript performance.

Mozilla released Wednesday a new version of Firefox 4 Beta that the company says runs web sites much faster than previous versions of the browser.

The new version provides a significant boost in running JavaScript and displaying graphics, Mozilla said. In addition, the add-on application programming interfaces for Firefox 4 are now stable, which means developers can start updating Firefox 3.6-compatible add-ons to support the upgrade.

The JavaScript performance boost stems from the addition of the JagerMonkey just-in-time compiler and more support for hardware-accelerated graphics, as well as hardware acceleration for Windows XP and Mac OS X. Mozilla says Firefox 4 Beta also includes support for WebGL, a standard technology for running 3D graphics in a browser without the use of a plug-in.

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