Almost every website I visit, including Bing search, gives me an "Insecure Connection" error code!!!
I have no idea what's going on. I have the latest Firefox Developer Edition English x64 and every website I try to connect to, Google, Bing, etc. give me this insecure connection error. I also have Chrome, Vivaldi, Edge & Opera browser and none of them give me issues like this.
There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connection certificates and send their own.
- uses an invalid security certificate SSL_ERROR_BAD_CERT_DOMAIN
- configured their website improperly
How to troubleshoot the error code "SEC_ERROR_UNKNOWN_ISSUER" on secure websites https://support.mozilla.org/en-US/kb/troubleshoot-SEC_ERROR_UNKNOWN_ISSUER
... give me this insecure connection error.
Click on the Advance and expand it so there is a certificate information that looks like a bunch of letters and such. Post that in chat so somebody can decode it and tell you what software is likely doing this. It is likely say a antivirus client inserting its own man in middle certificate if you have feature enabled in the client.