@Wetrix @nikolal its pretty simple without all the words lol. Basically when you go to whatever.com, your browser send a request to a DNS server unencrypted asking for the IP to whatever.com. adblockers block ads by watching these and blocking the ones to known ad and tracker URLs. Well DoH encrypts those, so your adblocker won't be able to see them. If it can't see them it can't block ads this way. Running your own DNS server at home solves the problem and still gets you privacy from your ISP.