I'm old enough that I remember pop-up ads and pop-up blockers. Pop-up blockers weren't controversial and were seen as necessary to combat the scourge of malicious advertisers. As a consequence, browses gained pop-up blocking by default and pop-up ads died out.

Chrome didn't exist yet.

@endrift still don't get why Firefox doesn't just ship with an adblock selector in the onboarding experience.

It'd get them so much userbase back in an instant. (Forget Chrome ever doing something like that lol.)