I am working with mozilla.cfg and I would like to create a certificate security exception. I have the following functional // Set SSO Parameters pref("network.automatic-ntlm-auth.trusted-uris", "fake.com"); pref("network.negotiate-auth.trusted-uris", "sso.fake.com"); pref("network.negotiate-auth.delegation-uris", "sso.fake.com"); pref("network.automatic-ntlm-auth.allow-non-fqdn", "true"); // Set domain white list pref("browser.fixup.domainwhitelist.fakecorp.com", "true"); pref("browser.fixup.domainwhitelist.fakeassociate.com", "true"); pref("browser.fixup.domainwhitelist.fake.com", "true"); However, there is a jump server during the SSO process that is forcing me to make a certificate security exception. Bottom line, I am seeking a means to pre-configure that exception using the mozilla.cfg method Environment details: Enterprise Active Directory delivering the "autoconfig.js" & "mozilla.cfg primarily Windows 7 Firefox 38.01 & 38.05