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
You would need an extension that could implement the drm, which would be no small feat and I’m not even sure how poss that would be with the extensions API. Not saying it won’t happen but i wouldn’t hold my breath.
I wouldn't use it anyway, because DRM is cancer.