It works, but it's buggy. The extension name does not appear in the settings and context menu. It looks like a (oddly) translation error. I suggested corrections on Github, I hope the developer sees it.

ojôioi

The extension is great, and has always worked perfectly. Unfortunately it hasn't been running for a few weeks: the application starts up, but then remains an empty modal continuously loading.
I abandoned it to move on to something else. I hope the problems will be resolved soon (some info for the developer: I have Firefox 84.0.2).