If, without logging out, I close a tab that I was using for, e.g., Twitter and later return to Twitter, it clearly recognizes me because it doesn’t go through the steps required with a ‘new login’.
But I see no cookies for Twitter in my Site Data.
How then does Twitter know that a full login check isn’t required and abbreviates the steps to get back up and running?
(This will always be in a Private or Private TOR tab.)