This thing hasn't been updated in 3 years, since October 2019. Try this other addon instead that actually works

https://addons.mozilla.org/en-US/firefox/addon/ad-blocker-for-facebook-app/

or get the Chrome version instead:

https://chrome.google.com/webstore/detail/video-ad-blocker-for-face/cfelggdancjlfmekcfekjemffindioac

Junk, not working.

Does not work.Installed,restarted Ffx,rebooted system, nothing.

This Firefox extension does what it's supposed to. I go to Facebook, the page hangs up for a moment (and Firefox offers to shut off the extension), but if I WAIT a few seconds, I can then browse Facebook as normal, WITHOUT sponsored posts. Please give the extension the opportunity to shut down the scripts that it needs to!

Pity, sponsored ads post are still visibles even after a force refresh (F5 or Ctrl+F5) and after a full restart. (Firefox 68.0 on a French Facebook webpage 15/07/2019)>. Still same 24/10/2022.

Unlike other extensions that aim to block Facebook sponsored posts this one seemed to work for me. Many thanks.