Mozilla Firefox 1.0 has now been downloaded over 45 million times. The download counter was taken off the Spread Firefox website shortly after the download count reached 25 million, but it has recently been readded with an RSS feed. They encourage people to use that RSS feed to display the download count on your own webpage in some unique way. I created a script similar to one posted in the comments of that post, and you can see it at the bottom of my front page.