diff --git a/components/AboutGroup.js b/components/AboutGroup.js
index a280cfab..f7a97d84 100644
--- a/components/AboutGroup.js
+++ b/components/AboutGroup.js
@@ -33,10 +33,8 @@
  *
  * ***** END LICENSE BLOCK ******/
 
-const IOService = Components.classes['@mozilla.org/network/io-service;1']
-					.getService(Components.interfaces.nsIIOService);
-
 Components.utils.import('resource://gre/modules/XPCOMUtils.jsm');
+Components.utils.import('resource://gre/modules/Services.jsm');
 
 function AboutGroup()
 {
@@ -49,7 +47,7 @@ AboutGroup.prototype = {
 
 	newChannel : function(aURI)
 	{
-		return IOService.newChannel('chrome://treestyletab/content/group.xul', null, null);
+		return Services.io.newChannel('chrome://treestyletab/content/group.xul', null, null);
 	},
 
 	getURIFlags : function(aURI)
diff --git a/modules/tabbarDNDObserver.js b/modules/tabbarDNDObserver.js
index ccb891ab..128f07b0 100644
--- a/modules/tabbarDNDObserver.js
+++ b/modules/tabbarDNDObserver.js
@@ -48,8 +48,7 @@ const SSS = Cc['@mozilla.org/content/style-sheet-service;1']
 				.getService(Ci.nsIStyleSheetService);
 const SecMan = Cc['@mozilla.org/scriptsecuritymanager;1']
 				.getService(Ci.nsIScriptSecurityManager);
-const IOService = Services.io;
- 
+
 function TabbarDNDObserver(aTabBrowser) 
 {
 	this.init(aTabBrowser);
@@ -1151,7 +1150,7 @@ catch(e) {
 							.split('\n')[0]];
 
 			case 'application/x-moz-file':
-				let fileHandler = IOService.getProtocolHandler('file')
+				let fileHandler = Services.io.getProtocolHandler('file')
 									.QueryInterface(Ci.nsIFileProtocolHandler);
 				return [fileHandler.getURLSpecFromFile(aData)];
 		}
diff --git a/modules/utils.js b/modules/utils.js
index 9d20936e..73d955ae 100644
--- a/modules/utils.js
+++ b/modules/utils.js
@@ -276,14 +276,6 @@ var TreeStyleTabUtils = {
 	},
 	_SessionStore : null,
 
-	get IOService() {
-		if (!this._IOService) {
-			this._IOService = Services.io;
-		}
-		return this._IOService;
-	},
-	_IOService : null,
-
 	get WindowMediator() {
 		if (!this._WindowMediator) {
 			this._WindowMediator = Services.wm;
@@ -1141,13 +1133,13 @@ var TreeStyleTabUtils = {
 		var newURI;
 		aURI = aURI || '';
 		if (aURI && String(aURI).indexOf('file:') == 0) {
-			var fileHandler = this.IOService.getProtocolHandler('file').QueryInterface(Ci.nsIFileProtocolHandler);
+			var fileHandler = Services.io.getProtocolHandler('file').QueryInterface(Ci.nsIFileProtocolHandler);
 			var tempLocalFile = fileHandler.getFileFromURLSpec(aURI);
-			newURI = this.IOService.newFileURI(tempLocalFile);
+			newURI = Services.io.newFileURI(tempLocalFile);
 		}
 		else {
 			if (!/^\w+\:/.test(aURI)) aURI = 'http://'+aURI;
-			newURI = this.IOService.newURI(aURI, null, null);
+			newURI = Services.io.newURI(aURI, null, null);
 		}
 		return newURI;
 	},