>>I’ve found a lot of people are quite naively idealistic around browser development.
So it is naive to hold a Non-Profit to their foundational mission statement and goal? Their Manfeisto?
Mozilla is not, or rather used to not be, just a For-Profit Software firm making a browser. They were a Non-Profit Foundation started to advance ideological and philosophical ideas, namely Open Web Standards and Access for all.
It seems like you are perfectly find with Losing the Mozilla Foundation, and replacing it with Mozilla Corporation the software developers that make a commercial browser.
Maybe FireFox 60 should just go closed source and charge $40 a download