Today is the day when Firefox 3 becomes available for download. "Download Day," basically a giant marketing tactic from Firefox, looks to break a Guinness World Record for the most software downloaded in 24 hours. The mayhem begins at 10:00 Los Angeles time. If you need help figuring out when the download will be available in your area, check out this handy map.

New features will make Firefox 3 faster than its predecessors with some new tools like spell checking, session restore and full zoom. There will also be some 5,000 available add-ons to fully customize your browsing experience.