Secure Connection Failed
I was trying to load our company website using windows but I was getting a 'Secure Connection Failed' with an Error code: SEC_ERROR_REVOKED_CERTIFICATE. But using firefox on android our site loads up just fine. A few weeks ago it still loads up but suddenly error message kept showing. I'm not really sure what's the cause of this since it loads up just fine with other browsers
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There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connection certificates and send their own.
This test page indicates the certificate was revoked as of May 30, 2020:
Firefox on desktop uses OCSP, which can check certificate revocation in real time. Due to bandwidth constraints, Firefox for Android uses a CRL (Certificate Revocation List) that is updated from time to time. I don't know why this certificate is not on the list. Maybe it is not an issuer that participates in CRL lists?