Opt-out can never be the right answer.
Mozilla actually has (had?) ads in Firefox, right on its default start page.
So? Is anyone who can’t afford one legally obliged to have a website?
So is NetSurf, and has been for most of this century already. I mean, it's great to see people even caring about independent browsers, but NetSurf surely needs much more love (and more developers). :-)
I wish that most forks wouldn't be even worse. Pale Moon, the most interesting one, is a gang of patent trolls.
Creators and journalists need money to survive, and currently, ad-supported viewing is necessary for that to happen.
The only way out of this is to block advertising. I, personally, think that you should not have a website if you can't pay for it yourself, but the only acceptable kind of website income is a paywall. If you just have "better advertising", advertising will never go away. And I hate ads.
The current incarnation of Mozilla would not be any meaningful loss to me.