The record came despite its downtime for about two hours after site visitors overloaded its server. At its peak, the server was said to be serving 17,000 downloads per minute. Mozilla’s CEO John Lilly has a blog post that will give you more figures about the first 24 hours.
Downloads came from various parts of the globe, led by the United States, Germany, Japan, Spain, and Britain. The previous version of Firefox was downloaded just 1.6 million times in the 24 hours after its launch.
Mozilla said that Guinness World Records is reviewing the world record attempt and may take a few days before confirmation.