At some point Mozilla pulled support for background-position-x and background-position-y citing they where never spec, breaking dozens of my sites on Firefox. All this crying and moaning about webkit dominating I'm starting to think is sour grapes. They don't want to innovate - they just want to feature kill and stagnate the web. It's one thing not to implement a feature, but to pull it? Between this action and Opera's decision to implement webkit I'm starting to wonder if these jokers even *care* if things work on their browsers anymore cause both those actions create headaches for me as a developer for no reasonable benefit.
Also, exactly how the hell are css sprites supposed to work in any position of the div but top left if you can't modify x and y independently. Idiots created an unfixable situation by pulling those attributes, and so in anger I won't be fixing those tags and I've pulled my -moz tags. If it wasn't for Firebug I wouldn't even use Firefox anymore.