Rated 5 out of 5 stars

Nice! And informative!
But how can I reset my statistics?

This review is for a previous version of the add-on (0.5.1-signed.1-signed). 

The statistics are generated from your browser history, so you can reset them by clearing your history (http://support.mozilla.com/en-US/kb/Clear Recent History). Similarly, you can also delete your downloads history from the downloads window.