XulBooster is an Eclipse Feature adding XUL support to the Eclipse IDE and WTP.
The Feature includes Editors, Views, Wizards, Snippets, Help, Builder etc.
We can develop with it firefox extension for example.
Improvement of Xul Extension Project wizard (template system).
New Xul extension Launcher.
Improvement of XUL Editor with a Preview panel (if you have the ATF plugin).
Notes: Xulbooster is not compatible with Eclipse 3.3