It is not healthy, but it is not trivial to fix -- I think building a modern spec compliant browser is expensive (=complicated). One way would be to create a b

It is not healthy, but it is not trivial to fix -- I think building a modern spec compliant browser is expensive (=complicated). One way would be to create a browser architecture from truly independent pieces that would allow one to pick implementations from different sources. That would split complexity and hopefully increase choice. To get this off the ground one would need an architecture and a functional reference implementation, which is a lot of work. If you get that, others will improve it from an OK state to greatness, but it must be end to end OK to start with for people to notice