The download count for Firefox 3 is at 5.4 million. With about 9 hours to go, it could go above 7 million - that's 7 million users for Firefox 3 on the day of the release!
The count for India, which was around 24,000 five hours ago is now at 47,602. UAE was at 1,401 and is now at 3,659. The U.S. was at 1.1 million and is now at 2.1 million.
A few users were unable to download Firefox 3 off the official site - they aren't included in the count unless they get it from the Mozilla servers.
The guys at Microsoft would probably be watching those numbers. It's not very likely for Internet Explorer 8 to get so many takers in one day unless they work on something big on the marketing front.