Firefox blocks me from juno email. webmaila.juno.com uses an invalid security certificate. The certificate is only valid for webmail.juno.com (Error code: ssl_error_bad_cert_domain). Even when I make an exception. When will this be fixed

You can go to https://webmail.juno.com/ to avoid that error.

^^ That & also I'm (seemingly) not getting the certificate error. Perhaps you have like a virus issue? :(

ps. Serious (security) errors like this probably shouldn't be taken lightly; & also it's 99.9% not a Firefox issue, btw. :)