> I fully expect that this move will certainly lose Mozilla a few Firefox users, but on balance it'll be a net win

I certainly hope so, for the sake of an open web. Hope they can take on the universal pushing and bundling that Google does with Chrome. Anecdotally I can say that none of my acquaintances are even aware of Firefox because Chrome can with their OS and they never saw a need to look beyond it. I hope Mozilla has a clear strategy to advocate and market Firefox, since technical merit alone is not going to out-compete Chrome's entrenched position.