> Mozilla has (many) problems, but it remains the main organisation fighting for the open web.

Well, it’s a different organisation from MS and Google anyway. I’m not sure how much I’d say they’re fighting for an open web, so much as I’d say they’re fighting for their slice of it. But the end result is more or less the same.

I'd argue that the EFF is the main organization fighting for the open web.

The EFF is great and important too, but I feel like developing a competitive browser has more direct impact.

I agree, but that's a very generous description of what Mozilla is doing. I'd say they're less "developing a competitive browser" and more "keeping an uncompetitive browser on life support to continue to profit off it".