Mozilla's Web o' Wonder notifies you at the top of the page if your graphics card drivers are out of date, an essential upgrade to perform to take advantage of hardware-accelerated browsing.

After 12 betas, 1 release candidate, and more than 10 months of work, Mozilla has determined that Firefox 4 is ready to join the competing high-wire acts of modernized browsers. The company has announced a release date of March 22. The current Firefox 4 release candidate is available for Windows, Mac, and Linux.

via Download.com.