Disabling third-party cookies hasn't really been that useful in a long time though. "When third-party cookies are allowed, 101 domains can reconstruct over 50%

Disabling third-party cookies hasn't really been that useful in a long time though. "When third-party cookies are allowed, 101 domains can reconstruct over 50% of a user's history and 161 could recover over 40%. Even when these cookies are blocked, 44 domains could recover over 40% of a user's history."[1] [1] Study back in 2014: https://securehomes.esat.kuleuven.be/~gacar/persistent/the_web_never_forgets.pdf https://securehomes.esat.kuleuven.be/~gacar/persistent/the_w... Add to that web beacons, ads, like buttons, browser fingerprinting via HTTP header, javascript, canvas, plug-ins, add-ons or hardware, keystroke biometrics and gestures on smartphones. Of course, there are also several techniques for e-mail tracking as well as tracking of documents (word, .pdfs etc).