Seems support’s internet certification has gone bad…
Your connection is not secure
The owner of en.support.guildwars2.com has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website.
This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox may only connect to it securely. As a result, it is not possible to add an exception for this certificate.
Learn moreā¦
Report errors like this to help Mozilla identify and block malicious sites
en.support.guildwars2.com uses an invalid security certificate.
The certificate is only valid for the following names:
*.guildwars2.com, guildwars2.com
Error code: SSL_ERROR_BAD_CERT_DOMAIN
Perty much got the same thing with Opera, although was able to bypass the issue.