www.spreadfirefox.com/en-US/worldrecord/
All you have to do is get Firefox 3 during Download Day to help set the record for most software downloads in 24 hours - it’s that easy. We're not asking you to swallow a sword or to balance 30 spoons on your face, although that would be kind of awesome.
The official date for the launch of Firefox 3 is June 17, 2008.