Also, 90% of sites these days try to access canvas, and don't break if disallowed - which probably means they try to fingerprint; this fingerprint is a '0-party

Also, 90% of sites these days try to access canvas, and don't break if disallowed - which probably means they try to fingerprint; this fingerprint is a '0-party' cookie, in that it correlates but isn't even stored on your machine. Firefox has a setting to stop that in about:config, if you are interested.