Mozilla development director Andreas Gal disclosed in the Developer Forum that Firefox will support H.264 video hardware decoding, currently mainly for the Android platform, in the future it may be extended to the desktop. Andreas Gal said, hardware-accelerated audio and video codec will support the codec comes with systems such as Android, the use of hardware-accelerated codec will help to extend battery life and enhance performance.

Desktop’s situation is more complicated,  H.264 codec is installed in Windows 7, but Windows XP does not, so Mozilla is for the mobile platform at this stage.