Mozilla just shattered an extension ecosystem and now there's like 10 extensions left. You can do store extensions in Nightly, but you now need a firefox account to do so. (And you have to press secret invisible buttons, not joking.) Non-store extensions are apparently canceled.
It's a power grab all the way down. We wouldn't make excuses if Google did that and we shouldn't make excuses if Mozilla does it.
Current Mozilla does not behave in a way that would demonstrate that they are a good steward for Firefox or the open web.
