Rated 4 out of 5 stars

A bit slow loading. Missing syntax highlighting, and ability to open sellected .xul file's preview to get an rough idea on what that file describes maybe like in Live xul editor:
http://ted.mielczarek.org/code/mozilla/xuledit/xuledit.xul

Nevertheless very usefull.

This review is for a previous version of the add-on (0.4.1).