They should do that. Cut a deal with some ad provider to serve non-tracking ads, and leave the rest in the dust. This would make Firefox a much more pleasant experience than other browsers, and give them some well-needed cash.
That is harder to justify. Tracking is an invasion of privacy, so blocking of trackers can be seen as a defense.
But blocking non-tracking ads, just because users don't like them and Mozilla could make a buck, would be seen an attack on publishers' revenue, even when publishers tried to do the right thing.
I don't what my browser to start changing the content of the pages I visit. Blocking well known trackers, sure. But the browser should be a platform. It's not like uBlock is flawless - there are tons of false positives so using it should be your own choice.
They should do that. Cut a deal with some ad provider to serve non-tracking ads, and leave the rest in the dust. This would make Firefox a much more pleasant experience than other browsers, and give them some well-needed cash.