diff --git a/content/treestyletab/treestyletab.xul b/content/treestyletab/treestyletab.xul
index e0bee6ce..4dafd284 100644
--- a/content/treestyletab/treestyletab.xul
+++ b/content/treestyletab/treestyletab.xul
@@ -16,7 +16,6 @@
 
 <script src="res/stopRendering.js" type="application/javascript"/>
 <script src="res/tabsDragUtils.js" type="application/javascript"/>
-<script src="res/UninstallationListener.js" type="application/javascript"/>
 <script src="treestyletab.js" type="application/javascript"/>
 <script src="windowHelper.js" type="application/javascript"/>
 <script src="windowHelperHacks.js" type="application/javascript"/>
diff --git a/modules/base.js b/modules/base.js
index a922479c..5186abb2 100644
--- a/modules/base.js
+++ b/modules/base.js
@@ -71,6 +71,8 @@ XPCOMUtils.defineLazyGetter(this, 'autoScroll', function() {
 	Components.utils.import('resource://treestyletab-modules/lib/autoScroll.js', {});
 	return window['piro.sakura.ne.jp'].autoScroll;
 });
+XPCOMUtils.defineLazyModuleGetter(this, 'UninstallationListener',
+  'resource://treestyletab-modules/lib/UninstallationListener.js');
 XPCOMUtils.defineLazyModuleGetter(this, 'confirmWithPopup', 'resource://treestyletab-modules/lib/confirmWithPopup.js');
 XPCOMUtils.defineLazyModuleGetter(this, 'utils', 'resource://treestyletab-modules/utils.js', 'TreeStyleTabUtils');
 
@@ -311,6 +313,8 @@ var TreeStyleTabBase = {
 
 		this.addPrefListener(this);
 
+		this.initUninstallationListener();
+
 		this.onPrefChange('extensions.treestyletab.indent.vertical');
 		this.onPrefChange('extensions.treestyletab.indent.horizontal');
 		this.onPrefChange('extensions.treestyletab.clickOnIndentSpaces.enabled');
@@ -488,7 +492,38 @@ var TreeStyleTabBase = {
 		}
 		utils.setTreePref('prefsVersion', this.kPREF_VERSION);
 	},
-	
+
+	initUninstallationListener : function TSTWindow_initUninstallationListener() 
+	{
+		var restorePrefs = function() {
+			// Remove pref listener before restore backuped prefs.
+			prefs.removePrefListener(this);
+
+			let restorePrefs = [
+				'browser.tabs.loadFolderAndReplace',
+				'browser.tabs.insertRelatedAfterCurrent',
+				'extensions.stm.tabBarMultiRows' // Super Tab Mode
+			];
+			for (let i = 0, maxi = restorePrefs.length; i < maxi; i++)
+			{
+				let pref = restorePrefs[i];
+				let backup = prefs.getPref(pref+'.backup');
+				if (backup === null) continue;
+				// we have to set to ".override" pref, to avoid unexpectedly reset by the preference listener.
+				prefs.setPref(pref+'.override', backup);
+				// restore user preference.
+				prefs.setPref(pref, backup);
+				// clear backup pref.
+				prefs.clearPref(pref+'.backup');
+			}
+		}.bind(this);
+		new UninstallationListener({
+			id : 'treestyletab@piro.sakura.ne.jp',
+			onuninstalled : restorePrefs,
+			ondisabled : restorePrefs
+		});
+	},
+
 	updateAeroPeek : function utils_updateAeroPeek() 
 	{
 		var ns = {};
diff --git a/content/treestyletab/res/UninstallationListener.js b/modules/lib/UninstallationListener.js
similarity index 83%
rename from content/treestyletab/res/UninstallationListener.js
rename to modules/lib/UninstallationListener.js
index 92fceafa..c8fb7959 100644
--- a/content/treestyletab/res/UninstallationListener.js
+++ b/modules/lib/UninstallationListener.js
@@ -13,6 +13,24 @@
  original:
    http://github.com/piroor/fxaddonlibs/blob/master/UninstallationListener.js
 */
+
+/* To work as a JS Code Module  */
+if (typeof window == 'undefined' ||
+	(window && typeof window.constructor == 'function')) {
+	this.EXPORTED_SYMBOLS = ['UninstallationListener'];
+
+	// If namespace.jsm is available, export symbols to the shared namespace.
+	// See: http://github.com/piroor/fxaddonlibs/blob/master/namespace.jsm
+	try {
+		let ns = {};
+		Components.utils.import('resource://my-modules/namespace.jsm', ns);
+		/* var */ window = ns.getNamespaceFor('piro.sakura.ne.jp');
+	}
+	catch(e) {
+		window = {};
+	}
+}
+
 (function() {
 	const currentRevision = 2;
 
@@ -165,3 +183,7 @@
 		}
 	};
 })();
+
+if (window != this) { // work as a JS Code Module
+	this.UninstallationListener = window['piro.sakura.ne.jp'].UninstallationListener;
+}
diff --git a/modules/window.js b/modules/window.js
index 44aa96e7..1a8bc6aa 100644
--- a/modules/window.js
+++ b/modules/window.js
@@ -40,6 +40,11 @@ const Ci = Components.interfaces;
 
 Components.utils.import('resource://gre/modules/XPCOMUtils.jsm');
 
+XPCOMUtils.defineLazyModuleGetter(this, "prefs",
+  'resource://treestyletab-modules/lib/prefs.js');
+XPCOMUtils.defineLazyModuleGetter(this, 'UninstallationListener',
+  'resource://treestyletab-modules/lib/UninstallationListener.js');
+
 XPCOMUtils.defineLazyModuleGetter(this, "Services", "resource://gre/modules/Services.jsm");
 
 Components.utils.import('resource://treestyletab-modules/base.js');
@@ -379,46 +384,18 @@ TreeStyleTabWindow.prototype = {
 	
 	initUninstallationListener : function TSTWindow_initUninstallationListener() 
 	{
-		var namespace = {};
-		Components.utils.import(
-			'resource://treestyletab-modules/lib/prefs.js',
-			namespace
-		);
-		var prefs = namespace.prefs;
-		namespace = void(0);
-		var self = this;
 		var restorePrefs = function() {
 				if (prefs.getPref('extensions.treestyletab.tabsOnTop.originalState')) {
 					prefs.clearPref('extensions.treestyletab.tabsOnTop.originalState');
 					try {
-						self.browser.treeStyleTab.position = 'top';
+						this.browser.treeStyleTab.position = 'top';
 					}
 					catch(e) {
 					}
-					self.window.TabsOnTop.enabled = true;
+					this.window.TabsOnTop.enabled = true;
 				}
-
-				if (!prefs) return;
-
-				let restorePrefs = [
-						'browser.tabs.loadFolderAndReplace',
-						'browser.tabs.insertRelatedAfterCurrent',
-						'extensions.stm.tabBarMultiRows' // Super Tab Mode
-					];
-				for (let i = 0, maxi = restorePrefs.length; i < maxi; i++)
-				{
-					let pref = restorePrefs[i];
-					let backup = prefs.getPref(pref+'.backup');
-					if (backup === null) continue;
-					// we have to set to ".override" pref, to avoid unexpectedly reset by the preference listener.
-					prefs.setPref(pref+'.override', backup);
-					// restore user preference.
-					prefs.setPref(pref, backup);
-					// clear backup pref.
-					prefs.clearPref(pref+'.backup');
-				}
-			};
-		new this.window['piro.sakura.ne.jp'].UninstallationListener({
+			}.bind(this);
+		new UninstallationListener({
 			id : 'treestyletab@piro.sakura.ne.jp',
 			onuninstalled : restorePrefs,
 			ondisabled : restorePrefs