Firefox recently rejected an extension for political reasons not technical ones for discsenter. Then it decided to stop apps being loaded unless they approved it.
That is censorship
You may not like disscenter but why stop there – run an advert blocker, it could be next.. Does your dictionary have words sjw’s or npc’s do not like – they might be gone.
Memes might be troublesome to firefox clearly an open internet is not something firefox want.
So think about another browser and do not send data to mozilla via firefox and disable those browser upgrades.