There's a good reason they aren't targeting the high end: they can't. A significant proportion of the weight behind non-web based UI comes from the need to eff

There's a good reason they aren't targeting the high end: they can't. A significant proportion of the weight behind non-web based UI comes from the need to efficiently leverage the GPU. You can almost get away without this on low res screens, but at 720p and beyond you need it as the sheer number of pixels starts to kill you. Google have thrown massive amounts of effort into making Chrome look like it's almost there, but the reality is the layout model doesn't map to well performing GPU primitives nearly as well as, say, Cocoa. Mozilla haven't been able to get even a fraction of a distance down this path. For this reason they'd have been better off chasing something like e-readers, since there the update speed isn't a big deal. But don't let anything like reason, logic or technical competence get in the way of Mozilla's decision making.