Mozilla is a rewrite. It shares little in common with NC4.
If Firefox were actually faster and had a smaller footprint, I'd be gung-ho. But it's not. Somewhere down the line they got lost.
I agree with splitting application off. I also think Nvu is a huge step up from Composer. But why is the codebase for FF1.0.1 larger than the entire Moz1.7.5 suite?
Maybe I missed something. Someone explain this to me.