Paste this regular expression in the Search bar at the top of the about:config page:

If any ssl or tls pref is bold (user set) then right-click that pref and choose 'Reset' to reset the pref to the default value. You can check the ssl and tls prefs on the about:config page to make sure that they are all default. If necessary then please attach a screenshot that shows the Certificate Viewer with the issuer. You can inspect details like the issuer and the certificate chain in the Details tab of the Certificate Viewer.Ĭheck who is the issuer of the certificate. click the 'View.' button to inspect the certificate in the Certificate Viewer.retrieve the certificate via the 'Get certificate' button.In the location field of this window type or paste the URL of the website with the protocol prefix ( ). chrome://pippki/content/exceptionDialog.xul.Open the 'Add Security Exception' window by pasting this chrome URL in the Firefox location/address bar and check the certificate: If you can't inspect the certificate via Advanced (I Understand the Risks) then try this: no authentication or signing on required)? Can you post a link to a publicly accessible page (i.e.

Firefox 45.0 2