Ahah.. not so important, but just a little self-achievement. I got my new certificate, can be called as “Mozilla Firefox 3 Certified Downloader” 
The certificate was given because I participated in Firefox 3 download on its launching date (Firefox Download Day: 6/17/08). FYI, Firefox 3 was downloaded by more than 8 million users in 24 hour period after its launching.
I guess I will print this certificate and frame it to put on my desk
