The problem is not technical - there's already a supercharged version of the old popup blocker: uBlock Origin, and it is permissively licensed such that any browser can embed it by default.
The problem is commercial - companies that make browsers have gone all-in on "growth & engagement" and the "attention economy" and rely on the web being terrible to make their money, either directly (Google, Edge) or indirectly (Mozilla, funded by Google and thus unlikely to bite the hand that feeds).
Browser makers have given up on serving their users because it turns out you make more money by exploiting them.
The problem is commercial - companies that make browsers have gone all-in on "growth & engagement" and the "attention economy" and rely on the web being terrible to make their money, either directly (Google, Edge) or indirectly (Mozilla, funded by Google and thus unlikely to bite the hand that feeds).
Browser makers have given up on serving their users because it turns out you make more money by exploiting them.