Today I needed to add an exception to handing this:
Your connection is not secure
The owner of tnation.t-nation.com has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website.
tnation.t-nation.com uses an invalid security certificate. The certificate is only valid for the following names: hybrid.s3ms.com, www.hybrid.s3ms.com Error code: SSL_ERROR_BAD_CERT_DOMAIN '