Most of the extensions and applications do not work (VPN...), although they also function on other browsers. Moreover, I see that other FireFox users use them, but for me they don’t even respond to opening. And I don't know who to turn to. My language is Russian. I do translation in Google. I apologize for bad English. But I will be grateful if someday I receive an answer. Example vpn-1click with an empty square. The other did not respond to pressing the power button. The third one simply had a black background. I can’t understand what’s happening. And I need help.