That makes me almost incoherently furious. I understand if you rebuild the foundation of a browser for better performance and that breaks all the extensions until the developers can rewrite them for the new model. I get it if one of my favorite extensions is no longer under active development and will never have a version released for the new model. But how fucking dare you gatekeep what I install on my own browser? Freedom from this walled-garden bullshit is the only reason I run Firefox instead of Chrome. Google's twice as good at UI as you. They're faster, look better, and miraculously I never have to swipe five times trying to dismiss a Chrome tab.
I get that Mozilla is drowning, flailing around trying to create a future where they aren't irrelevant. This is just ugly, though.