toolkit.jar:
% content mozapps %content/mozapps/
  content/mozapps/handling/handler.css                          (content/handler.css)
  content/mozapps/handling/handler.xml                          (content/handler.xml)
  content/mozapps/handling/dialog.xul                           (content/dialog.xul)
  content/mozapps/handling/dialog.js                            (content/dialog.js)