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by dingdongding 3501 days ago
May be you are using Gmail/Facebook login which is already signed in ?
1 comments

Nope - I get auto logged in via their links as well, but don't use any 3rd party auth.
Are the links from the emails they send out? Might be a token in those links. I don't have any quora emails right now to check.
The email links definitely contain tokens - not only will they log you in but the articles they generate on the page will reflect the order of articles in the email you received, as opposed to the most recent articles on your feed.