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
me too but i don't think its a good idea to to trust their good gesture yet; their product lines are still hella closed and not allow for much customization. even in the rare instances they allow to they impose arbitrary limitation and/or require their software