They don't have to. I think gorhill recognises it's simply unfeasible to produce an effective content blocker on MV3, and I hope he puts his foot down and doesn

They don't have to. I think gorhill recognises it's simply unfeasible to produce an effective content blocker on MV3, and I hope he puts his foot down and doesn't take on the maintenance burden of an additional nerfed browser extension. If web devs want to make web experiences worse in Firefox by issuing warnings everywhere, then Firefox can even the score by having a useable ad-free experience.