Fifty million Firefox downloads
Firefox 1.0.x reached approximately 50,000,000 downloads today. That's an average of almost 300,000 downloads per day since Firefox was released on November 9, 2004. Spread Firefox is celebrating with a photo contest, which already has several winners. It's great to be involved in such a successful project.
I don't have anything against the convention of celebrating numbers that have a lot of zeros at the end when written in base 10, but I'd like to make fun of it by pointing out that Firefox is likely to reach 0x3000000 (50,331,648) downloads within a week.