This IMO is the absolute worst technology news I have read in ages. I hope this doesn’t happen.
Browser extensions such as Ghostery Privacy Ad Blocker, uBlock Origin, and Privacy Badger, along with scripting extensions including TamperMonkey, which are each designed to block adverts and other content and/or protect one’s privacy online, are expected to function less effectively, if they can even make the transition from Mv2 to the new approach: Manifest v3.