Firefox requires CSS files to be identified as text/css by the server, and your CGP server is misconfigured.
In old versions of CGP, the text/css mime-type was not installed by default, and when upgrading to a new version, this setting couldn't be automatically updated. For new installations of a recent version, this problem does not arise.
To fix this problem, open CGP webadmin and go to Settings/WebUser (pre-5.1) or Settings/Access/Webuser (under HTTP User, post-5.1). In the MIME types list, enter standard mime types, such as html->text/html, htm->text/html, css->text/css, jpg->image/jpeg, png->image/png, js->text/javascript. You can enter others that comes in your mind, but with these ones LookOut should display properly
You may need to empty your browser cache for it to display LookOut correctly.
Some other features that could make their way in LookOut 4:
LookOut 4 development is currently halted to give place to other projects. It may resume one day if demand is high enough.