Extension developers always have problems uninstalling their extensions while testing their own extention. Then FEBE came along and saved the day.
Now, CLEO takes it one step further than FEBE and creates an XPI package from all of your extensions so you don't need to worry about losing your extensions. Naturally, FEBE has to be installed for this extension to work.
To access the extension, go under Tools/FEBE/CLEO and create a package. The extension will "zip" up all of your extension and provide a finished XPI.
The installation was easy and the extension builds on what extension developers really need: an easy way to double click and restore all of your extensions with no hassles. The extension builds on what FEBE has successfully done and takes the extension from a backup utility to a developers utility.