Privacy and 1st and 3rd party cookies

A thread on 1st-party vs. 3rd-party cookies, and how tracking companies are actively trying to undermine users' privacy preferences.

First, some basics (this is simplified):

A cookie is a key/value pair (a variable) that allows websites to save data in users' web browsers. 1/

— Serge Egelman (@v0max) November 27, 2019