My findings are mixed. The add-on works as advertised, but the third party services it uses often don't. Bibliogram usage is now limited to begin with - as detailed in the "Future of Bibliogram" blog post - even on instances where it works. Nitter instance availability is also spotty, I had around 10-30% success rate. Unfortunately this all is not the author's fault, but it's what makes their add-on experience bad.

3 star because not recommended by Mozilla, but more importantly because I constantly hit dead frontends.

While is an all-around good extension. The invidious is broken. It does not proxy googlevideos all the way. Invidition did so until no connection to Google is made on this add-on I can't recommend.