looks like rendering adblockers extensions obsolete with manifest-v3 was not enough so now they try to implement DRM into the browser giving the ability to any website to refuse traffic to you if you don't run a complaint browser ( cough...firefox )
here is an article in hacker news since i'm sure they can explain this to you better than i.
and also some github docs
Because it is legal in the US to bribe politicians and this company has a lot of money
Also doesn't help that half the people supposedly in charge of cracking down on this kind of thing in the US belong in an old folks home. Most of them don't even comprehend the issue.
I'm surprised I haven't heard any pushback on it from the EU though.