https://support.mozilla.org/ha/kb/what-does-your-connection-is-not-secure-mean?redirectslug=how-resolve-weak-crypto-error-messages-firefox&redirectlocale=en-US
What do the security warning codes mean? | Firefox Taimako
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.
do the securitywarningcodesmeanfirefox