Pretty much all the ones on this website that are marked green. XD
By the way “location.services.mozilla.com” is the top blocked thing on my Pi-Hole. It is one thing to have it try guess my location, but a whole other thing to spam that request more often than everything else, especially if it does not even work for the way my Internet connects. (I sure as heck am not in any large City like Berlin, Frankfurt or München)