Yes. It wasn’t updated with the same features as nos2x in Chrome so I switched to Alby in Firefox.
Discussion
so it's safe to use? thanks!
You’re talking about nos2x by fiatjaf? That’s the one I had. There’s also a fork for Firefox called nos2x-fox. I didn’t try that one, but it’s recommended from the main nos2x GitHub. Take that to mean what you will.