The website automatically logins to my account without entering mail address and password. How does this work even though after restarting router, clearing cache & cookies of browser?
Don't know, I do however have a problem with Quora that is probably related to whatever way they achieve their auto login. I have an Quora account, but at some point in time I accidentally clicked register instead of login, and now I'm permanently stuck in the registration process. Can't login, and the registration is impossible to complete, at least the last time I tried.<p>Yeah and I tried to clear everything I could, but no dice.
Does it work when you switch between browsers and do you happen to be on OS X? Something might live on in keychain/cloud whatever.<p>They could potentially be using something based on this, <a href="https://panopticlick.eff.org" rel="nofollow">https://panopticlick.eff.org</a>
May be with an ETag:<p><a href="https://en.wikipedia.org/wiki/HTTP_ETag" rel="nofollow">https://en.wikipedia.org/wiki/HTTP_ETag</a>