Privacy Badger is pretty good at blocking things like this -- it watches out for domains that are third-party for more than one site, and blocks requests to the

Privacy Badger is pretty good at blocking things like this -- it watches out for domains that are third-party for more than one site, and blocks requests to them. Does require some tweaking for genuine CDNs (and indeed comes with a yellow-list of common domains that will receive requests but not cookies) but generally very useful. https://www.eff.org/privacybadger https://www.eff.org/privacybadger