That is fair, though I think it would be a tough pill to swallow for most people, and Firefox is neither leading the charts nor do they have any significant advantage over the competition in web browsing to roll out a bold move like this.
It's a tough position. I do use it and hope they make it (*remain in business), just for the sake of competition.

Firefox just lets you turn all of that off for free, and donate to their non-profit. I don't see a problem paid Firefox would solve.