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
Ad Blocking is cyber security
https://en.wikipedia.org/wiki/Malvertising?wprov=sfla1
The FBI recommends using an ad blocker: https://www.ic3.gov/Media/Y2022/PSA221221