Mozilla’s newest browser, Firefox 4.0, has broken its own 24 hour download record that it set back in 2008 when it launched Firefox 3.0.

On the second day of its launch, Mozilla users downloaded 8.75 million versions of Firefox 4, up from the 7.1 million it had on its first day from early Wednesday to early Thursday of last week, reports Computerworld. The numbers from the second day broke the certified Guinness World Record that the Firefox 3 attained in 2008 with over 8 million downloads in 24 hours in what Mozilla dubbed “download day.”

Although Firefox 3 was able to reach an official World Record, not the same can be said of the Firefox 4 as no Guinness representative was present at the servers to audit the numbers like in 2008. Firefox 4 was also able to eclipse the new Internet Explorer 9 which only tallied 2.4 million downloads in 24 hours since it was launched two weeks.

One analyst isn’t surprised by the high number of downloads saying that there was a lot of pent-up demand for Firefox in recent months with all the delays, and also said that there was a difference between Firefox and IE9 users, “The Firefox user base is primarily power user, with a much smaller percentage of corporate users compared with IE9,” said Al Hilwa, an analyst with IDC. “Most large IE9 corporate users [work in] lock-downed environments, and so upgrading is under IT control and, thus, slower,” he added to Computerworld.

In terms of speed and performance, some benchmark testing found that Firefox 4 ran slightly faster than Internet Explorer’s newest version in some tests. “Though the competition is extremely close in some cases–especially JavaScript rendering–Firefox 4 is strongly favored by HTML5 processing, boot time, and memory usage. Overall, I’d judge from these results that Firefox 4 is the winner this time around,” states Cnet.

As of Monday, Mozilla’s scoreboard shows that over 37 million copies of Firefox 4 have been downloaded.