If you haven’t heard by now, Firefox 4 has been released. As part of the release the software engineers setup an amazing download tracking system with an equally amazing UI presentation of the resulting stats. Below, I posted a link to their blog on how they achieved the end results. I highly recommend any web dev to give it a read as the implemented solutions are quite clever.

A technological breakdown is here: http://blog.mozilla.com/data/2011/03/22/how-glow-mozilla-org-gets-its-data/

And the actual implementation is here: http://glow.mozilla.org/