Firefox Mobile - Browser User Agent

Hi guys. I have been scouring the net but I can't find anything concrete on this. Does anyone know if it's an official policy of Mozilla to have Firefox on Android identify itself no differently to the desktop? Is there an extension that will let me change the user agent that works with the mobile version? Its kinda annoying getting the full site when you're on a tiny screen and you know there is a great mobile site available.

I really think this is an impediment to widespread use of Firefox Mobile.