Firefox has already surpassed the 5 million download mark it set out to meet in its first 24 hours. As I write this, the browser just passed the 7 million download mark for its version 3.0 software, and with over 6800 downloads per minute (and rising) is on track to do 8 million or more by 1pm ET (24 hours since the download went live). Whether that’s a record is hard to say, but it’s very impressive nonetheless. Are you using Firefox 3? Do you plan to upgrade?

You can watch the live count as it streams in from Mozilla’s raw server logs, and according to the download day page, the majority of downloads have come from the US. Despite some hiccups yesterday, Firefox had no problem setting the record (though no one really seems to know if there was any old mark to break — so anything might have been a record with Guinness watching).

Net Applications has been tracking the uptake of Firefox 3 since yesterday morning, and it is now at around 4.5% — not bad for its first 24 hours. Firefox on the whole is closing in on 20% market share and is higher among tech savvy crowds (over 50% on this blog, for example). That 4.5% of Firefox web browser users are already using version 3 indicates that about 25% of its user base has upgraded overnight — that’s very impressive.

If you’re still on the fence about upgrading, check out the pair of great overviews of FF3 from Lifehacker here and here.

Are you using Firefox 3? Do you plan to upgrade? Let us know in the comments and vote in our poll below.