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
Hmm I think I need to read more about Manifest v3 as it appears my knowledge of the topic is pretty limited to literally just "v3 will kill ad blockers", basing my understanding on a couple of comments and 2 news report videos is a bad thing to do, don't you agree