Monitor build status of your projects from Firefox status bar.

This site hosts sources for the Addon as well as beta and archived versions.

If you just want to install latest stable version do it from official Mozilla Addons Site

Installation Notes

You should have cruisecontrol.war or CCNet dashboard deployed in order to use this extension
To install in Thunderbird, download Addon to local drive and open from Tools->Extensions menu
You should specify URL to RSS feed page for the project in Addon preferences if you're using latest versions of CruiseControl server. Since format of index page had changed in version 2.4 we're now parsing RSS feed XML.