title: Import self signed ssl certificate .pem to firefox
body: <p>I added self signed certificate in .pem format in Firefox under <em>Authorities tab</em>. When I access site, Firefox throws error </p>
  
  <blockquote>
    <p>mozilla_pkix_error_ca_cert_used_as_end_entity</p>
  </blockquote>
  
  <p>It says that the certificate is not trusted because it is self signed. What can be issue?</p>