Despite getting off to a slow start yesterday, the official release of the Firefox 3 browser was downloaded 8.3 million times (that’s the unofficial tally as of 11:16 AM PT today). Mozilla beat its goal of 5 million downloads by 3 million and set a new world record! All right, there was no previous world record, but it still represents a massive one-day adoption rate.

According to Mozilla Foundation CEO John Lilly, that gives Firefox 3 a four percent market share of browsers worldwide straight out of the gate. Mozilla’s servers sent out 83 terabytes of data during that time, and at the peak there were 17,000 downloads per second (with an average of 4,000 per second). That explains why I had to wait so long to download my copy. The browser was downloaded in 200 different countries, with the top ten being

U.S.
Germany
Japan
Spain
UK
France
Iran
Italy
Canada
Poland

Yes, Firefox 3 is big in Iran and Poland. IE doesn’t stand a chance.