We took a look at Mozilla's mobile OS at the final pre-proper CES event yesterday, and little did we know the official release of its Firefox 18 browser was dropping today. The update adds the new Javascript compiler IonMonkey, which is said to make wep apps "perform up to 25 percent faster." Mac users who will settle for nothing less than high-res browsing will be happy to know Retina display support has been implemented, as long as you're on OS X