I’m getting these errors in Firefox (Nightly, but the version shouldn’t matter terribly much):
The owner of meteor.stimhack.com has configured their website improperly. To protect your information from being stolen, Nightly has not connected to this website.
This site uses HTTP Strict Transport Security (HSTS) to specify that Nightly may only connect to it securely. As a result, it is not possible to add an exception for this certificate.
And asking for more details says:
meteor.stimhack.com uses an invalid security certificate. The certificate expired on December 7, 2017, 12:00 PM. The current time is December 7, 2017, 5:06 PM. Error code: SEC_ERROR_EXPIRED_CERTIFICATE
Can the site owner renew the HTTPS certificate? One free copy of SSL Endorsement awaits…