Do you specifically need it to be in a bat file? You can add it to your firefox security exception by following these instructions, [https://support.mozilla.org/en-US/questions/1076086/ per cor-el in this thread]: 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 url sso.sud.kz * retrieve the certificate via the "Get certificate" button * click the "View..." button to inspect the certificate in the Certificate Viewer