See: https://developer.mozilla.org/en-US/docs/Tools/Web_Console/Custom_output Topic: **Customize previews for objects** I have been trying to get the **String-only output**, **Rich output**, and **Add object previewers to the server** examples working without success. Any chance you can add examples for these? I am trying to integrate FirePHP deeper than just rendering my own objects into HTML. $feature https://github.com/firephp/firephp-for-firebug.next/issues/1