The Comodo Dragon browser is a new browser with advanced security options. Most of the security is based on SSL certificates, the browser has been made lightweight too. Many options are missing because 'they ain't tested yet'.
The Dragon browser is based on the Chromium version 3. So it doesn't support extensions. But Dragon doesn't miss only that, it also lacks the bookmark sync, automatic translation, and all the other Google features. And even the reporting feature, that was a major concern to Google Chrome users when that browser got released.