This utility can list cookies for current domain, but cannot list cookies for other domains for security reasons. For more details on the Same Origin Policy, visit https://en.wikipedia.org/wiki/Same-origin_policy
Once cookies are accepted, however, the EU e-Privacy Directive plugin cannot control cookies from 3rd party sites, as they are from a different domain and are out of reach due to the Same Origin Policy (linked above). You can return your browser to a cookie-free state for this site if you want to test this functionality. By following the process for your browser on the Clearing Cookies page, you can experience the cookie blocking capabilities of the EU e-Privacy Directive plugin.