Add a "Visit anyway" (and a "Add exception") to the "SSL_ERROR_BAD_CERT_DOMAIN"-page. Example: https://www.malwarebattle.blogspot.com/

You can normally add a security exception if this happens (see https://wrong.host.badssl.com/), but the site you're visiting has HSTS turned on (https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security) and thus we don't allow overriding certificates.

but if you access the site via the numeric IP, you can still do it ?!? 1) A power-user should always be able to add an exception. 2) And the "more info" should say, why it finds the cert "bad". Also the current situation is misleading as per bug 1092243 comment 1 see also Bug 902884