Firefox does not display green address bar when visiting a web site with Extended Validation certificate

Problem
When accessing a web site with an Extended Validation certificate, you may experience the following behavior:

Green bar does not appear for Firefox users

Cause
Currently, Extended Validation certificates are natively supported by Internet Explorer 7, Firefox 3.x+, Opera 9 and Safari 3.2+.

Resolution
To resolve this problem, ensure Online Certificate Status Protocol (OCSP) is enabled.

- Open Firefox browser
- From the tool bar, click Tools > Options > Advanced > Encryption tab > Validation
- Ensure Use OCSP to validate only certificates that specify an OCSP service URL is checked