diff --git a/modules/utils.js b/modules/utils.js
index 82403cca..93ec9649 100644
--- a/modules/utils.js
+++ b/modules/utils.js
@@ -1,238 +1,238 @@
-/* ***** BEGIN LICENSE BLOCK ***** 
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is the Tree Style Tab.
- *
- * The Initial Developer of the Original Code is YUKI "Piro" Hiroshi.
- * Portions created by the Initial Developer are Copyright (C) 2010-2013
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s): YUKI "Piro" Hiroshi <piro.outsider.reflex@gmail.com>
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either the GNU General Public License Version 2 or later (the "GPL"), or
- * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ******/
-
-"use strict";
-
-let EXPORTED_SYMBOLS = ['TreeStyleTabUtils'];
-
-const Cc = Components.classes;
-const Ci = Components.interfaces;
-const Cu = Components.utils;
-
-Cu.import('resource://gre/modules/XPCOMUtils.jsm');
-Cu.import('resource://treestyletab-modules/constants.js');
-
-XPCOMUtils.defineLazyGetter(this, 'window', function() {
-	Cu.import('resource://treestyletab-modules/lib/namespace.jsm');
-	return getNamespaceFor('piro.sakura.ne.jp');
-});
-XPCOMUtils.defineLazyGetter(this, 'prefs', function() {
-	Cu.import('resource://treestyletab-modules/lib/prefs.js');
-	return window['piro.sakura.ne.jp'].prefs;
-});
-XPCOMUtils.defineLazyGetter(this, 'stringBundle', function() {
-	Cu.import('resource://treestyletab-modules/lib/stringBundle.js', {});
-	return window['piro.sakura.ne.jp'].stringBundle;
-});
-
-XPCOMUtils.defineLazyModuleGetter(this, 'TreeStyleTabConstants',
-  'resource://treestyletab-modules/constants.js', 'TreeStyleTabConstants');
-
-const TST_PREF_PREFIX = 'extensions.treestyletab.';
-const TST_PREF_VERSION = 9;
-
-
-let TreeStyleTabUtils = {
-
-	get prefs () {
-		return prefs;
-	},
-
-/* Save/Load Prefs */
-
-	getTreePref : function TSTUtils_getTreePref(aPrefstring)
-	{
-		return prefs.getPref(TST_PREF_PREFIX + aPrefstring);
-	},
-
-	setTreePref : function TSTUtils_setTreePref(aPrefstring, aNewValue)
-	{
-		return prefs.setPref(TST_PREF_PREFIX + aPrefstring, aNewValue);
-	},
-
-	clearTreePref : function TSTUtils_clearTreePref(aPrefstring)
-	{
-		return prefs.clearPref(TST_PREF_PREFIX + aPrefstring);
-	},
-
-	migratePrefs : function utils_migratePrefs()
-	{
-		// migrate old prefs
-		var orientalPrefs = [];
-		switch (this.getTreePref('prefsVersion'))
-		{
-			case 0:
-				orientalPrefs = orientalPrefs.concat([
-					'extensions.treestyletab.tabbar.fixed',
-					'extensions.treestyletab.enableSubtreeIndent',
-					'extensions.treestyletab.allowSubtreeCollapseExpand'
-				]);
-			case 1:
-			case 2:
-				if (this.getTreePref('urlbar.loadSameDomainToNewChildTab') !== null) {
-					let value = this.getTreePref('urlbar.loadSameDomainToNewChildTab');
-					this.setTreePref('urlbar.loadSameDomainToNewTab', value);
-					this.setTreePref('urlbar.loadSameDomainToNewTab.asChild', value);
-					if (value) {
-						this.setTreePref('urlbar.loadDifferentDomainToNewTab', value);
-					}
-					this.clearTreePref('urlbar.loadSameDomainToNewChildTab');
-				}
-			case 3:
-				if (this.getTreePref('loadDroppedLinkToNewChildTab') !== null) {
-					this.setTreePref('dropLinksOnTab.behavior',
-						this.getTreePref('loadDroppedLinkToNewChildTab.confirm') ?
-							TreeStyleTabConstants.kDROPLINK_ASK :
-						this.getTreePref('loadDroppedLinkToNewChildTab') ?
-							TreeStyleTabConstants.kDROPLINK_NEWTAB :
-							TreeStyleTabConstants.kDROPLINK_LOAD
-					);
-					this.clearTreePref('loadDroppedLinkToNewChildTab.confirm');
-					this.clearTreePref('loadDroppedLinkToNewChildTab');
-				}
-				if (this.getTreePref('openGroupBookmarkAsTabSubTree') !== null) {
-					let behavior = 0;
-					if (this.getTreePref('openGroupBookmarkAsTabSubTree.underParent'))
-						behavior += TreeStyleTabConstants.kGROUP_BOOKMARK_USE_DUMMY;
-					if (!this.getTreePref('openGroupBookmarkBehavior.confirm')) {
-						behavior += (
-							this.getTreePref('openGroupBookmarkAsTabSubTree') ?
-								TreeStyleTabConstants.kGROUP_BOOKMARK_SUBTREE :
-							this.getTreePref('browser.tabs.loadFolderAndReplace') ?
-								TreeStyleTabConstants.kGROUP_BOOKMARK_REPLACE :
-								TreeStyleTabConstants.kGROUP_BOOKMARK_SEPARATE
-						);
-					}
-					this.setTreePref('openGroupBookmark.behavior', behavior);
-					this.clearTreePref('openGroupBookmarkBehavior.confirm');
-					this.clearTreePref('openGroupBookmarkAsTabSubTree');
-					this.clearTreePref('openGroupBookmarkAsTabSubTree.underParent');
-					prefs.setPref('browser.tabs.loadFolderAndReplace', !!(behavior & TreeStyleTabConstants.kGROUP_BOOKMARK_REPLACE));
-				}
-			case 4:
-				let (prefs = [
-						'extensions.treestyletab.autoCollapseExpandSubTreeOnSelect',
-						'extensions.treestyletab.autoCollapseExpandSubTreeOnSelect.onCurrentTabRemove',
-						'extensions.treestyletab.autoCollapseExpandSubTreeOnSelect.whileFocusMovingByShortcut',
-						'extensions.treestyletab.autoExpandSubTreeOnAppendChild',
-						'extensions.treestyletab.autoExpandSubTreeOnCollapsedChildFocused',
-						'extensions.treestyletab.collapseExpandSubTree.dblclick',
-						'extensions.treestyletab.createSubTree.underParent',
-						'extensions.treestyletab.show.context-item-reloadTabSubTree',
-						'extensions.treestyletab.show.context-item-removeTabSubTree',
-						'extensions.treestyletab.show.context-item-bookmarkTabSubTree',
-						'extensions.multipletab.show.multipletab-selection-item-removeTabSubTree',
-						'extensions.multipletab.show.multipletab-selection-item-createSubTree'
-					]) {
-					for (let i = 0, maxi = prefs.length; i < maxi; i++)
-					{
-						let pref = prefs[i];
-						let value = prefs.getPref(pref);
-						if (value === null) {
-							continue;
-						}
-						prefs.setPref(pref.replace('SubTree', 'Subtree'), value);
-						prefs.clearPref(pref);
-					}
-				}
-			case 5:
-				let (behavior = this.getTreePref('openGroupBookmark.behavior')) {
-					behavior = behavior | 2048;
-					this.setTreePref('openGroupBookmark.behavior', behavior);
-				}
-			case 6:
-				let (
-					general = this.getTreePref('autoAttachNewTabsAsChildren'),
-					search = this.getTreePref('autoAttachSearchResultAsChildren')
-					) {
-					if (general !== null)
-						this.setTreePref('autoAttach', general);
-					if (search !== null)
-						this.setTreePref('autoAttach.searchResult', search);
-				}
-			case 7:
-				let (
-					enabled = this.getTreePref('autoCollapseExpandSubtreeOnSelect.whileFocusMovingByShortcut'),
-					delay = this.getTreePref('autoCollapseExpandSubtreeOnSelect.whileFocusMovingByShortcut.delay')
-					) {
-					if (enabled !== null) {
-						this.setTreePref('autoExpandSubtreeOnSelect.whileFocusMovingByShortcut', enabled);
-						this.setTreePref('autoExpandSubtreeOnSelect.whileFocusMovingByShortcut.collapseOthers', enabled);
-					}
-					if (delay !== null)
-						this.setTreePref('autoExpandSubtreeOnSelect.whileFocusMovingByShortcut.delay', delay);
-				}
-			case 8:
-				orientalPrefs = orientalPrefs.concat([
-					'extensions.treestyletab.indent',
-					'extensions.treestyletab.indent.min'
-				]);
-			default:
-				for (let i = 0, maxi = orientalPrefs.length; i < maxi; i++)
-				{
-					let pref = orientalPrefs[i];
-					let value = prefs.getPref(pref);
-					if (value === null) {
-						continue;
-					}
-					prefs.setPref(pref+'.horizontal', value);
-					prefs.setPref(pref+'.vertical', value);
-					prefs.clearPref(pref);
-				}
-				break;
-		}
-		this.setTreePref('prefsVersion', TST_PREF_VERSION);
-	},
-
-/* string bundle */
-	get treeBundle () {
-		return stringBundle.get('chrome://treestyletab/locale/treestyletab.properties');
-	},
-	get tabbrowserBundle () {
-		return stringBundle.get('chrome://browser/locale/tabbrowser.properties');
-	},
-
-	evalInSandbox : function utils_evalInSandbox(aCode, aOwner)
-	{
-		try {
-			var sandbox = new Cu.Sandbox(aOwner || 'about:blank');
-			return Cu.evalInSandbox(aCode, sandbox);
-		}
-		catch(e) {
-		}
-		return void(0);
-	}
-
-};
+/* ***** BEGIN LICENSE BLOCK ***** 
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is the Tree Style Tab.
+ *
+ * The Initial Developer of the Original Code is YUKI "Piro" Hiroshi.
+ * Portions created by the Initial Developer are Copyright (C) 2010-2013
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s): YUKI "Piro" Hiroshi <piro.outsider.reflex@gmail.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ******/
+
+"use strict";
+
+let EXPORTED_SYMBOLS = ['TreeStyleTabUtils'];
+
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+const Cu = Components.utils;
+
+Cu.import('resource://gre/modules/XPCOMUtils.jsm');
+Cu.import('resource://treestyletab-modules/constants.js');
+
+XPCOMUtils.defineLazyGetter(this, 'window', function() {
+	Cu.import('resource://treestyletab-modules/lib/namespace.jsm');
+	return getNamespaceFor('piro.sakura.ne.jp');
+});
+XPCOMUtils.defineLazyGetter(this, 'prefs', function() {
+	Cu.import('resource://treestyletab-modules/lib/prefs.js');
+	return window['piro.sakura.ne.jp'].prefs;
+});
+XPCOMUtils.defineLazyGetter(this, 'stringBundle', function() {
+	Cu.import('resource://treestyletab-modules/lib/stringBundle.js', {});
+	return window['piro.sakura.ne.jp'].stringBundle;
+});
+
+XPCOMUtils.defineLazyModuleGetter(this, 'TreeStyleTabConstants',
+  'resource://treestyletab-modules/constants.js', 'TreeStyleTabConstants');
+
+const TST_PREF_PREFIX = 'extensions.treestyletab.';
+const TST_PREF_VERSION = 9;
+
+
+let TreeStyleTabUtils = {
+
+	get prefs () {
+		return prefs;
+	},
+
+/* Save/Load Prefs */
+
+	getTreePref : function TSTUtils_getTreePref(aPrefstring)
+	{
+		return prefs.getPref(TST_PREF_PREFIX + aPrefstring);
+	},
+
+	setTreePref : function TSTUtils_setTreePref(aPrefstring, aNewValue)
+	{
+		return prefs.setPref(TST_PREF_PREFIX + aPrefstring, aNewValue);
+	},
+
+	clearTreePref : function TSTUtils_clearTreePref(aPrefstring)
+	{
+		return prefs.clearPref(TST_PREF_PREFIX + aPrefstring);
+	},
+
+	migratePrefs : function utils_migratePrefs()
+	{
+		// migrate old prefs
+		var orientalPrefs = [];
+		switch (this.getTreePref('prefsVersion'))
+		{
+			case 0:
+				orientalPrefs = orientalPrefs.concat([
+					'extensions.treestyletab.tabbar.fixed',
+					'extensions.treestyletab.enableSubtreeIndent',
+					'extensions.treestyletab.allowSubtreeCollapseExpand'
+				]);
+			case 1:
+			case 2:
+				if (this.getTreePref('urlbar.loadSameDomainToNewChildTab') !== null) {
+					let value = this.getTreePref('urlbar.loadSameDomainToNewChildTab');
+					this.setTreePref('urlbar.loadSameDomainToNewTab', value);
+					this.setTreePref('urlbar.loadSameDomainToNewTab.asChild', value);
+					if (value) {
+						this.setTreePref('urlbar.loadDifferentDomainToNewTab', value);
+					}
+					this.clearTreePref('urlbar.loadSameDomainToNewChildTab');
+				}
+			case 3:
+				if (this.getTreePref('loadDroppedLinkToNewChildTab') !== null) {
+					this.setTreePref('dropLinksOnTab.behavior',
+						this.getTreePref('loadDroppedLinkToNewChildTab.confirm') ?
+							TreeStyleTabConstants.kDROPLINK_ASK :
+						this.getTreePref('loadDroppedLinkToNewChildTab') ?
+							TreeStyleTabConstants.kDROPLINK_NEWTAB :
+							TreeStyleTabConstants.kDROPLINK_LOAD
+					);
+					this.clearTreePref('loadDroppedLinkToNewChildTab.confirm');
+					this.clearTreePref('loadDroppedLinkToNewChildTab');
+				}
+				if (this.getTreePref('openGroupBookmarkAsTabSubTree') !== null) {
+					let behavior = 0;
+					if (this.getTreePref('openGroupBookmarkAsTabSubTree.underParent'))
+						behavior += TreeStyleTabConstants.kGROUP_BOOKMARK_USE_DUMMY;
+					if (!this.getTreePref('openGroupBookmarkBehavior.confirm')) {
+						behavior += (
+							this.getTreePref('openGroupBookmarkAsTabSubTree') ?
+								TreeStyleTabConstants.kGROUP_BOOKMARK_SUBTREE :
+							this.getTreePref('browser.tabs.loadFolderAndReplace') ?
+								TreeStyleTabConstants.kGROUP_BOOKMARK_REPLACE :
+								TreeStyleTabConstants.kGROUP_BOOKMARK_SEPARATE
+						);
+					}
+					this.setTreePref('openGroupBookmark.behavior', behavior);
+					this.clearTreePref('openGroupBookmarkBehavior.confirm');
+					this.clearTreePref('openGroupBookmarkAsTabSubTree');
+					this.clearTreePref('openGroupBookmarkAsTabSubTree.underParent');
+					prefs.setPref('browser.tabs.loadFolderAndReplace', !!(behavior & TreeStyleTabConstants.kGROUP_BOOKMARK_REPLACE));
+				}
+			case 4:
+				let (subTreePrefs = [
+						'extensions.treestyletab.autoCollapseExpandSubTreeOnSelect',
+						'extensions.treestyletab.autoCollapseExpandSubTreeOnSelect.onCurrentTabRemove',
+						'extensions.treestyletab.autoCollapseExpandSubTreeOnSelect.whileFocusMovingByShortcut',
+						'extensions.treestyletab.autoExpandSubTreeOnAppendChild',
+						'extensions.treestyletab.autoExpandSubTreeOnCollapsedChildFocused',
+						'extensions.treestyletab.collapseExpandSubTree.dblclick',
+						'extensions.treestyletab.createSubTree.underParent',
+						'extensions.treestyletab.show.context-item-reloadTabSubTree',
+						'extensions.treestyletab.show.context-item-removeTabSubTree',
+						'extensions.treestyletab.show.context-item-bookmarkTabSubTree',
+						'extensions.multipletab.show.multipletab-selection-item-removeTabSubTree',
+						'extensions.multipletab.show.multipletab-selection-item-createSubTree'
+					]) {
+					for (let i = 0, maxi = subTreePrefs.length; i < maxi; i++)
+					{
+						let pref = subTreePrefs[i];
+						let value = prefs.getPref(pref);
+						if (value === null) {
+							continue;
+						}
+						prefs.setPref(pref.replace('SubTree', 'Subtree'), value);
+						prefs.clearPref(pref);
+					}
+				}
+			case 5:
+				let (behavior = this.getTreePref('openGroupBookmark.behavior')) {
+					behavior = behavior | 2048;
+					this.setTreePref('openGroupBookmark.behavior', behavior);
+				}
+			case 6:
+				let (
+					general = this.getTreePref('autoAttachNewTabsAsChildren'),
+					search = this.getTreePref('autoAttachSearchResultAsChildren')
+					) {
+					if (general !== null)
+						this.setTreePref('autoAttach', general);
+					if (search !== null)
+						this.setTreePref('autoAttach.searchResult', search);
+				}
+			case 7:
+				let (
+					enabled = this.getTreePref('autoCollapseExpandSubtreeOnSelect.whileFocusMovingByShortcut'),
+					delay = this.getTreePref('autoCollapseExpandSubtreeOnSelect.whileFocusMovingByShortcut.delay')
+					) {
+					if (enabled !== null) {
+						this.setTreePref('autoExpandSubtreeOnSelect.whileFocusMovingByShortcut', enabled);
+						this.setTreePref('autoExpandSubtreeOnSelect.whileFocusMovingByShortcut.collapseOthers', enabled);
+					}
+					if (delay !== null)
+						this.setTreePref('autoExpandSubtreeOnSelect.whileFocusMovingByShortcut.delay', delay);
+				}
+			case 8:
+				orientalPrefs = orientalPrefs.concat([
+					'extensions.treestyletab.indent',
+					'extensions.treestyletab.indent.min'
+				]);
+			default:
+				for (let i = 0, maxi = orientalPrefs.length; i < maxi; i++)
+				{
+					let pref = orientalPrefs[i];
+					let value = prefs.getPref(pref);
+					if (value === null) {
+						continue;
+					}
+					prefs.setPref(pref+'.horizontal', value);
+					prefs.setPref(pref+'.vertical', value);
+					prefs.clearPref(pref);
+				}
+				break;
+		}
+		this.setTreePref('prefsVersion', TST_PREF_VERSION);
+	},
+
+/* string bundle */
+	get treeBundle () {
+		return stringBundle.get('chrome://treestyletab/locale/treestyletab.properties');
+	},
+	get tabbrowserBundle () {
+		return stringBundle.get('chrome://browser/locale/tabbrowser.properties');
+	},
+
+	evalInSandbox : function utils_evalInSandbox(aCode, aOwner)
+	{
+		try {
+			var sandbox = new Cu.Sandbox(aOwner || 'about:blank');
+			return Cu.evalInSandbox(aCode, sandbox);
+		}
+		catch(e) {
+		}
+		return void(0);
+	}
+
+};