I don't know what to ask. Firefox previously was easy to use. Now one needs to have an advanced IT degree to use it. I must move to a different browser, I think. I can't access my router. I receive a "Unable to connect

Firefox can’t establish a connection to the server at..." message. I have to switch to Chrome to access my own router. I have looked at all the security settings. I'd put in an exception, but the "brilliant" software does not allow it without a certificate. I have looked at information about certificates. I'd need to get another degree to understand that. I have created certificates, but Firefox won't use them. It's pointless, and should not be so difficult just to use a browser.