Index: lib/notificationHelper.js
diff --git a/lib/notificationHelper.js b/lib/notificationHelper.js
index 9a8875a3ecb3c8357397763406546df3c9371be6..2dc0ce900dcac3aadff84bbe881c3931a9bd341a 100644
--- a/lib/notificationHelper.js
+++ b/lib/notificationHelper.js
@@ -17,12 +17,14 @@
 
 /** @module notificationHelper */
 
-let {startIconAnimation, stopIconAnimation} = require("icon");
-let {Utils} = require("utils");
-let {Notification: NotificationStorage} = require("notification");
-let {stringifyURL} = require("url");
-let {initAntiAdblockNotification} = require("antiadblockInit");
-let {Prefs} = require("prefs");
+"use strict";
+
+const {startIconAnimation, stopIconAnimation} = require("icon");
+const {Utils} = require("utils");
+const {Notification: NotificationStorage} = require("notification");
+const {stringifyURL} = require("url");
+const {initAntiAdblockNotification} = require("antiadblockInit");
+const {Prefs} = require("prefs");
 
 let activeNotification = null;
 let activeButtons = null;
@@ -36,7 +38,7 @@ displayMethods.information = ["icon", "popup"];
 function prepareNotificationIconAndPopup()
 {
   let animateIcon = shouldDisplay("icon", activeNotification.type);
-  activeNotification.onClicked = function()
+  activeNotification.onClicked = () =>
   {
     if (animateIcon)
       stopIconAnimation();
@@ -120,7 +122,7 @@ function notificationButtonClick(buttonIndex)
       break;
     case "configure":
       Prefs.notifications_showui = true;
-      ext.showOptions(function(page)
+      ext.showOptions(page =>
       {
         page.sendMessage({
           type: "app.respond",
@@ -150,14 +152,14 @@ function initChromeNotifications()
     if (activeNotification && activeNotification.type != "question" && !("links" in activeNotification))
       return;
 
-    chrome.notifications.clear(notificationId, function(wasCleared)
+    chrome.notifications.clear(notificationId, wasCleared =>
     {
       if (wasCleared)
         notificationClosed();
     });
   }
 
-  chrome.notifications.onButtonClicked.addListener(function(notificationId, buttonIndex)
+  chrome.notifications.onButtonClicked.addListener((notificationId, buttonIndex) =>
   {
     notificationButtonClick(buttonIndex);
     clearActiveNotification(notificationId);
@@ -229,7 +231,7 @@ function showNotification(notification)
 /**
  * Initializes the notification system.
  */
-exports.initNotifications = function()
+exports.initNotifications = () =>
 {
   if ("notifications" in chrome)
     initChromeNotifications();
@@ -241,10 +243,7 @@ exports.initNotifications = function()
  *
  * @return {?object}
  */
-exports.getActiveNotification = function()
-{
-  return activeNotification;
-};
+exports.getActiveNotification = () => activeNotification;
 
 let shouldDisplay =
 /**
@@ -255,7 +254,7 @@ let shouldDisplay =
  * @param {string} notificationType
  * @return {boolean}
  */
-exports.shouldDisplay = function(method, notificationType)
+exports.shouldDisplay = (method, notificationType) =>
 {
   let methods = displayMethods[notificationType] || defaultDisplayMethods;
   return methods.indexOf(method) > -1;