What do the security warning codes mean?

Firefox shows you a warning page about a potential security risk when you try to connect to a secure site but your connection is not secure.

Security certificate problem trips up Bing Web site - CNET

A Guide to Understanding DTC Codes

All http sites are redirecting to https and display potential security risk ahead error, Firefox Support Forum

How to Fix “The certificate is not trusted because the issuer certificate is unknown” error message

HTTP Status Codes: A Complete Guide & List of Error Codes

Guide on How to Fix the 'Warning: Potential Security Risk Ahead' in Firefox

What Is a STOP Code? (Bug Check Code, BSOD Code)

How to fix a “Your connection is not private” error - Norton

HTTP Status Codes Explained

HTTP Status Codes: A Complete List + Explanations