the last update broked everything, this add-on was perfect, reverse the update and my 5 stars are also back
-update, this developer is making this add-on as a hobby and he doesn't have a lot of time, please respect his work, he will release all the old features in the future
please check this : https://github.com/ParticleCore/Iridium/issues/737#issuecomment-541321036
edit 2: I installed and old version from this add-on and it's working perfectly ! just go to https://addons.mozilla.org/firefox/addon/particle-iridium/versions
And please Particle, open an Utip so we can donate by just watching ads of our own free will