Because you're supposed to use Firefox with a plugin like uMatrix or NoScript to block cookies regardless of the website's "legitimate" practices. Protip: 90%+

Because you're supposed to use Firefox with a plugin like uMatrix or NoScript to block cookies regardless of the website's "legitimate" practices. Protip: 90%+ of websites work great without cookies. And, you can do other things like... block scripts from phishy domains like google.com.