The easiest way to tinker with this extension on Firefox 1.5+ is to:

* Check out the source files
* Edit the file with a GUID-name to contain the path to the directory you checked the content out in
* Add  the file with a GUID-name to the extensions/ directory of the profile dir

This will allow XUL changes to be reflected on a refresh, and changes to components.js on a restart.

Note: To create a usable XPI, you will need to temporarily replace chrome.manifest with chrome.XPI.manifest