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Distrust or Delete proxy CA certificate failed

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  • Ultima risposta di Michele Rodaro

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Hey folks,

i need to delete an old custom CA certificate from Firefox due to expiration date and replace it with the new one. Our company uses a proxy server with its own CA certificate. I did this kind of tasks several time in the past without any issue at all but now it seems to be different.

I am able to distrust or delete it from Certificate panel but in effect when i try to browse without any valid proxy certificate, for instance to google site, i get the error:

MOZILLA_PKIX_ERROR_MITM_DETECTED

and when i go to check certificates i find both google cert and old proxy cert.

I tried to uninstall firefox and clean Mozilla's %appdata% folders in Local, Localraw and Roaming without any success.

Is there anything about certificate saved on win registry or some other place?

Any tips are welcome

Hey folks, i need to delete an old custom CA certificate from Firefox due to expiration date and replace it with the new one. Our company uses a proxy server with its own CA certificate. I did this kind of tasks several time in the past without any issue at all but now it seems to be different. I am able to distrust or delete it from Certificate panel but in effect when i try to browse without any valid proxy certificate, for instance to google site, i get the error: MOZILLA_PKIX_ERROR_MITM_DETECTED and when i go to check certificates i find both google cert and old proxy cert. I tried to uninstall firefox and clean Mozilla's %appdata% folders in Local, Localraw and Roaming without any success. Is there anything about certificate saved on win registry or some other place? Any tips are welcome
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Modificato da Walter il

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Ciao, prova a vedere se questo paragrafo del nostro articolo di supporto ti può essere in qualche modo d'aiuto o metterti sulla strada giusta:

https://support.mozilla.org/it/kb/questa-connessione-non-sicura#w_mozilla-pkix-error-mitm-detected