Why is nothing I do to "unblock" facebook from my FireFox not working? It still says "connection is untrusted" and there is no "add exeption" button either.
Everytime I try to go to facebook it just shows me the "Untrusted Connection" page. There isn't even a button that says "add exception". I have tried EVERYTHING to "unblock" it. What do I do?
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If you click on "technical details", what message is shown there?
www.facebook.com uses an invalid security certificate.
The certificate is not trusted because no issuer chain was provided.
(Error code: sec_error_unknown_issuer)
This is likely due to security software on your computer. It looks like you have the McAfee plugin installed. Are you able to get this error to go away by confirming the exception?
Open this chrome URI by pasting or typing this URI in the location/address bar to open the "Add Security Exception" window and check the certificate:
- chrome://pippki/content/exceptionDialog.xul
In the location field type/paste the URL of the website
- retrieve the certificate via the "Get certificate" button
- inspect the certificate via the "View..." button
The website may try to fallback to TLS 1.0 in a way that is no longer allowed in current releases or may be using a deprecated cipher suite.
You can open the about:config page via the location/address bar and use its search bar to locate this pref:
- security.tls.insecure_fallback_hosts
You can double-click the line to modify the pref and add the full domain (TEXT) to the value of this pref. If there are already websites (domains) in this list then add a comma and the new domain (no spaces). There should only be domains separated by a comma in the Value column (example.com,www.example.com).
If this helps then you can contact this website and ask them to look into this and update their security.