>>973
前半を以下のようにする。
(function()
{
window.document.addEventListener("load",
function(event){
if (!event.originalTarget.location) return;
var doc = event.originalTarget;
var href = doc.location.href
if (href != "chrome://browser/content/bookmarks/bookmarksPanel.xul")
{
return;
}

doc.getElementById("bookmarks-view").addEventListener("click", function(aEvent)
{
var parents = new Array();