I added a few exceptions for internal servers with self-signed certificates via Settings->Security->Show Certificates->Server->Add Exception (permanent exceptions). But these exceptions do not prevent the certificate warning on first connect, after restarting firefox I always need to allow a exception for all of these servers (I have mutiple tabs with monitoring / management sites for some servers open). How to get rid of the warning ? (I can't use let's encrypt certificates on the server, because the server have no internet connection.). Additional: In the german version of the certificate management dialog are certificate name ("Zertifikatsname") and server name ("Servername") column headings (or data) exchanged, the "certificate name" column shows the server name and vice versa.