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Cookie lifetime in Chrome

While documenting our security and privacy policies for GDPR, I got a question about the Windows Identity Foundation cookies created after logging into ADFS.

When looking in the Chrome Developer tools, we noticed that the Expires/Max-Age setting was set to 1969-12-31…:

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We were wondering why this strange date? When I opened the same site in Edge, I saw the following in the Edge Developer Tools:

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The cookie lifetime is set to Session, which makes more sense. Probably the Chrome Developer Tools are showing a minimum date when the cookie lifetime is linked to the session.

Kind of confusing…

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