bookmarks-tree, bookmarks-tree[type="multi-column"]
  {
    -moz-binding          : url("chrome://communicator/content/bookmarks/bookmarksTree.xml#bookmarks-tree-full");
  }
  
bookmarks-tree[type="single-column"]
  {
    -moz-binding          : url("chrome://communicator/content/bookmarks/bookmarksTree.xml#bookmarks-tree-name");
  }

bookmarks-tree[type="folders"]
  {
    -moz-binding          : url("chrome://communicator/content/bookmarks/bookmarksTree.xml#bookmarks-tree-folders");
  }