Firefox is finally 64-bit on your Windows PC
 

Believe it or not, Firefox on Windows has been a 32-bit affair until now -- while Google and Microsoft made the leap to 64-bit web browsing a while back, Mozilla hasn't been quite so quick off the mark. All's well after today, though, as Mozilla has...

http://www.engadget.com/2015/12/15/f...4-bit-windows/