See the following video by Matt Cutts (head of Google’s web-spam team):
Wow, he is wearing a Firefox t-shirt in a public video!!
Completely agree with the youtube user Todd Daubs:
You know you work for a cool company when you can wear a t-shirt advertising a different browser than the company’s own.
Webmaster, this also means that wearing firefox tshirt can boost ranking of your websites. Buy it noooow! :p
My advice: Always bet on JS
(Also on BrowserFame )