What's the status of third party, unauthorized firefox extensions these days, didn't they ban them or make them a pain in the arse to use several years ago? Th

What's the status of third party, unauthorized firefox extensions these days, didn't they ban them or make them a pain in the arse to use several years ago? They might not have to host it, but if they make it hard/impossible for others to host and use it then they're certainly violating the first of the four freedoms of free software: https://www.gnu.org/philosophy/free-sw.en.html https://www.gnu.org/philosophy/free-sw.en.html