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I can't seem to import certificates into Firefox

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I am trying to import a couple of root certificates and my personal certificate into Firefox. When I try the root cert, Firefox says that it is already there as a CA. But I can't find it in the list of cert authorities. When I try to import my personal cert, it asks for the password, and then says that it is successfully restored, including the private keys, but it doesn't show up in the list of certificates under the 'Your Certificates' tab. And it clearly isn't there, since when I go to cert testing site, the claim is that no certificate was offered by the browser.

I am trying to import a couple of root certificates and my personal certificate into Firefox. When I try the root cert, Firefox says that it is already there as a CA. But I can't find it in the list of cert authorities. When I try to import my personal cert, it asks for the password, and then says that it is successfully restored, including the private keys, but it doesn't show up in the list of certificates under the 'Your Certificates' tab. And it clearly isn't there, since when I go to cert testing site, the claim is that no certificate was offered by the browser.

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You can try to rename or delete the file cert8.db in the Profile Folder to remove all intermediate certificates and user certificates that Firefox has stored.

Help > Troubleshooting Information > Profile Directory: Open Containing Folder