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Update 20 June 2008: 8 million downloads, those r the magical numbers which should help Firefox to enter the record books.
Update 3 July 2008: Here is the official mail received from Firefox team
"We set a Guinness World Record for the most software downloads in 24 hours. With your help we reached 8,002,530 downloads.
You are now part of a World Record and the proud owner of the best version of Firefox yet!"Here is the certificate for participation in the World Record.