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I approved a security exception to a website. Now I would like to go back and undo that security exception. How do I do this?

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I was trying to request a library book. The site was a San Diego County library site. The Firefox error message said the website's certification was outdated.

I was trying to request a library book. The site was a San Diego County library site. The Firefox error message said the website's certification was outdated.

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Hi,

You can try to delete the correct certificate via Tools (Alt + T) > Options > Advanced > Encryption > View Certificates > Servers. Options > Advanced

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