When I connect to an SSL site, sometimes firefox displayes a warning message and I can select add exception. When I click on "I understand the risk" and then "view certificate", it says no need to add exception. It actually shows the EV SSL Cert green bar. Why is the firefox showing the error in first place. I do use host file entry for the SSL site. This does not happen all the time. Sometimes, the page with the green bar is shown properly. This is a big problem as once you enter some information and submit, the warning may come back again and page is then not shown.