1. super system, should be 5 stars but:
2. except that their DNS is in conflict with FF settings. I am NO specialist, just make it work please.
3. settings you put in the main is not snc with other settings in FF or Edge etc.

BEI DEM TEXT "WebRTC deaktivieren
WebRTC kann Ihre IP-Adresse lecken," USW. SOLLTE STEHEN "leaken" VON "to leak" ODER ES IST "ein Leck verursachen" GEMEINT - lecken (undicht sein – schwaches Verb): durch ein Leck Flüssigkeit herauslaufen lassen ; lecken (sich widersetzen – schwaches Verb) [Duden]

The better

Please introduce a toolbar shortcut! This is the only minor issue I do have with the AdGuard extension: The time needed to disable and re-enable it, as it otherwise is a huge time saver and very much worth in it doing what it promises.
Otherwise it is an unbeatable extension to stop annoying ads on Firefox appearing even avoiding lags while playing videos. Sorry, YT, but your new ad policy just became to annoying. I turn the blocker from time to time, just to see, whether you got a little more sense of the issue - and I disable the extension when using other sites than YT.

super

It's really Greattt and it's Free ❤️

Seems like a bug in 4.4.18 Adguard now crashes and silently disappears from the gadget bar and you start wondering why you're seeing ads. Then go to Adguard's extension properties page and you see that it's toggle is still on, but you have to toggle it off then back on to get Adguard running again and showing again on the extension bar. This has now happened on 4.4.18 twice on one of my PCs and once on my other one. In earlier Adguard version this has never happened.