Mozilla easter egg.
If you are a Firefox user, try this in your browser type about:mozilla in your browser and hit enter or click here , you will see a hidden message displayed in your browser window, which is also called as a virtual easter egg, according to wikipedia A virtual Easter egg is a hidden message or feature in an object such as a movie,book,CD,DVD, Computer program or a Video game,other mozilla products like netscape also contain hidden messages here is a wiki link for those. if you use utorrent application click on help-->about and press t on your keyboard to launch a hidden game of Tetris. for more information on virtual easter eggs check this wiki page. Thanks starscream.