I am one of the developers of the Censor Tracker add-on, which is listed on Mozilla’s add-on repository. We recently noticed that our add-on is now unavailable in Russia, despite being developed specifically to circumvent censorship in Russia. We have not changed any visibility settings, nor have we received any emails regarding this action. Our Russian users now see this message when they visit the page of Censor Tracker: That page is not available in your region The page you tried to acce...
Mozilla centrally signs every add-on—but the add-ons in question are still signed by Mozilla
Mozilla runs a centralized distribution platform but you can self-host your add-on if you want and you have the option to use a custom update URL—the add-ons in question are still hosted by Mozilla, however, they are geo-blocked in the country that counts
It’s actually a bit more complicated than that: