Building on its recent advancements in JavaScript optimization, Mozilla has announced a partnership with Epic Games that will bring the Unreal Engine 3 to Firefox. Unlike the ill-fated InstantAction, this gives developers the opportunity to port high-end titles to the web without the use of plugins. Hardly content with enhancing desktop browser-based games, Mozilla is aiming to bring this experience to mobile devices -- but it's stopping short of providing any details beyond that. The company notes that it's currently working with major developers such as EA, ZeptoLab and Disney to bring optimizations to their existing titles. Mum's the word on when 50 Cent: Blood on the Sand will get the chance to soak browsers everywhere, but you can catch a video preview of something slightly less spectacular just after the break.