If you don't agree with the standard, create a campaign to modify the standard. Mozilla Firefox has demonstrated time after time that they will modify their software to match the latest versions of standards.Or if it's your broken server, simply fix ...
And to people still wondering why Firefox doesn't "fix" this issue, Firefox is simply following the standard which expliclitly says that the user shall not have an option to skip the security. See the bug reporthttps://bugzilla.mozilla.org/show_bug.c...
The site is *literally* configured to use encrypted connection with an option "Please, do not allow connection to the site unless a valid TLS certificate is provided." (also called HSTS) and when the site has invalid TLS certificate you think the bro...