Perhaps it's canvas fingerprinting. [1] I saw an article from 2014 saying ghostery works to defeat it, but haven't looked further and I don't use ghostery, so

Perhaps it's canvas fingerprinting. [1] I saw an article from 2014 saying ghostery works to defeat it, but haven't looked further and I don't use ghostery, so not sure if that's true still. You can test it here: https://browserleaks.com/canvas https://browserleaks.com/canvas [1] https://arstechnica.com/information-technology/2017/02/now-sites-can-fingerprint-you-online-even-when-you-use-multiple-browsers/ https://arstechnica.com/information-technology/2017/02/now-s...