Privacy Badger

Privacy Badger stops advertisers and other third-party trackers from secretly tracking where you go and what pages you look at on the web. If an advertiser seems to be tracking you across multiple websites without your permission, Privacy Badger automatically blocks that advertiser from loading any more content in your browser.

Using a technique known as "heuristic blocking", Privacy Badger observes
cookies and other data generated by websites you visit. If they appear
to be used for tracking, for example an advertiser from a third-party
website watching your browsing habits, they are eliminated.