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How do I load my own root certificate into firefox

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I have a local only test ca and test web server. How do I load the CA certificate into Firefox. Adding it via "settings" did not work, the browser says Adding a root via "settings" does nothing. When I access a web server it says "the original certificate provided by the server is untrusted", in the issuer name field. It never actually shows the certificate. Adding a file to the appdata area (this is on windows 10) also fails; changing the enterprise ca settings does not work. This used to work.

I have a local only test ca and test web server. How do I load the CA certificate into Firefox. Adding it via "settings" did not work, the browser says Adding a root via "settings" does nothing. When I access a web server it says "the original certificate provided by the server is untrusted", in the issuer name field. It never actually shows the certificate. Adding a file to the appdata area (this is on windows 10) also fails; changing the enterprise ca settings does not work. This used to work.

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You can use a policy to import a certificate. See:

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That page describes placing the certificate in appdata, which didn't work, and the later section references GPO - this is a stand-alone Windows 10 workstation, there is no active directory domain and no group policy. There is no "HKLM\Software\policies\Mozilla..." registry key.

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You can use the policies.json file in the distribution folder.

You can use the full path, but you need to escape backslashes (\\).