
Shortly afterwards, I opened the page again, and it lists me as someone completely different: I do not own this account, and yet it appears that, for all intents and purposes, I had logged in as it. I did not try performing any operations as said user with the sole exception of accessing the Steam profile page of the linked account (and only for the purpose of verifying it was not mine). I have now logged out of that account, re-logged into my own, and invalidated my token (though I don't know what good that will do, if it doesn't invalidate login sessions in web browsers).