But this is not the full source... I have uploaded the full source here: http://www.myupload.dk/showfile/908525d7de1.zip/ (can't guarantee how long time the link will work).

Yea, but the way MafiaaFire is made is quite "vulnerable". ICE can just 'steal' MafiaaFire's domain(s) and the the addon doesn't work anymore. This is one of the reasons I've made a re-write of MafiaaFire ( https://addons.mozilla.org/da/firefox/addon/fireice/ )