ブックマーク登録メニューにスターボタンのようなアイコンを付ける

BookmarksIconic.css

@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);
/*
CSS だけでできたヽ(´ー｀)ノ…できてなかった＞＜
*/
#context-bookmarkpage,
/*#context-bookmarkframe,
#context-bookmarklink,*/
#menu_bookmarkThisPage {
  -moz-binding: url("chrome://global/content/bindings/menu.xml#menuitem-iconic") !important;
}

:-moz-any(
  #context-bookmarkpage,
/*  #context-bookmarkframe,
  #context-bookmarklink,*/
  #menu_bookmarkThisPage) .menu-iconic-icon
{
  background: transparent no-repeat center center -moz-element(#star-button) !important;
}

BookmarksIconic.uc.js

// ==UserScript==
// @name           BookmarksIconic.uc.js
// @description    ブックマーク登録メニューにスターボタンのようなアイコンを付ける
// @namespace      http://d.hatena.ne.jp/Griever/
// @author         Griever
// @license        MIT License
// @compatibility  Firefox 10
// @charset        UTF-8
// @include        main
// @version        0.0.1
// ==/UserScript==

(function(css){

({
	init: function() {
		$('bookmarksMenuPopup').addEventListener("popupshowing", this, false);
		$('contentAreaContextMenu').addEventListener("popupshowing", this, false);
		window.addEventListener("unload", this, false);
		this.style = addStyle(css);
	},
	uninit: function() {
		$('bookmarksMenuPopup').removeEventListener("popupshowing", this, false);
		$('contentAreaContextMenu').removeEventListener("popupshowing", this, false);
		window.removeEventListener("unload", this, false);
	},
	destroy: function() {
		this.uninit();
		if (this.style) this.style.parentNode.removeChild(this.style);
	},
	handleEvent: function(event) {
		switch(event.type){
			case "popupshowing":
				if (event.target != event.currentTarget) return;
				if (event.target.id === "bookmarksMenuPopup") {
					$('menu_bookmarkThisPage').setAttribute("starred", this.hasBookmarks(gBrowser.currentURI));
				}
				else if (event.target.id === "contentAreaContextMenu") {
					$('context-bookmarkpage').setAttribute("starred", this.hasBookmarks(gContextMenu.browser.currentURI));
					$('context-bookmarklink').setAttribute("starred", gContextMenu.onLink ? this.hasBookmarks(gContextMenu.linkURL) : "false");
				}
				break;
			case "unload":
				this.uninit();
				break;
		}
	},
	hasBookmarks: function(aURI) {
		var uri = typeof aURI == "string" ? makeURI(aURI) : aURI;
		return PlacesUtils.getMostRecentBookmarkForURI(uri) != -1;
	}
}).init();


function $(id) { return document.getElementById(id); }
function addStyle(css) {
	var pi = document.createProcessingInstruction(
		'xml-stylesheet',
		'type="text/css" href="data:text/css;utf-8,' + encodeURIComponent(css) + '"'
	);
	return document.insertBefore(pi, document.documentElement);
}


})(<![CDATA[
@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);

#menu_bookmarkThisPage[starred],
#context-bookmarkpage[starred],
#context-bookmarklink[starred] {
  -moz-binding: url("chrome://global/content/bindings/menu.xml#menuitem-iconic") !important;
  list-style-image: url("chrome://browser/skin/places/bookmark.png") !important;
  -moz-image-region: rect(0px, 16px, 16px, 0px) !important;
}

#menu_bookmarkThisPage[starred="true"],
#context-bookmarkpage[starred="true"],
#context-bookmarklink[starred="true"] {
  list-style-image: url("chrome://browser/skin/places/editBookmark.png") !important;
}

]]>.toString());