Privacy Badger uses simple heuristics like cookie entropy estimation, domain prevalence (how many other domains embed that domain's stuff): https://github.com/E

Privacy Badger uses simple heuristics like cookie entropy estimation, domain prevalence (how many other domains embed that domain's stuff): https://github.com/EFForg/privacybadger/blob/master/src/js/heuristicblocking.js https://github.com/EFForg/privacybadger/blob/master/src/js/h... and static block lists https://www.eff.org/files/cookieblocklist_new.txt https://www.eff.org/files/cookieblocklist_new.txt