I'd be happier if Firefox received more support. A relatively equal duopoly of browsers is preferable IMO to 80% market share for one, and the remaining 20% broken up amongst half a dozen competing alternatives.
Lot of developer power out there that would be better spent improving what's mostly already there (Firefox) rather than starting multiple different projects from scratch again. People will burn up any energy and spare time they had to help without even seeing a new browser render it's first HELL WORLD