diff --git a/extension/popup.js b/extension/popup.js
index 5cd27f4..f4cbb6b 100644
--- a/extension/popup.js
+++ b/extension/popup.js
@@ -1,6 +1,7 @@
 var config = new Config();
 var gsites = new Sites(config);
 
+//Add to ignored sites
 function addIgnoredSite(new_site) {
   return function() {
     chrome.extension.sendRequest(
@@ -11,6 +12,7 @@ function addIgnoredSite(new_site) {
   };
 }
 
+//Convert seconds to time in string format
 function secondsToString(seconds) {
   if (config.timeDisplayFormat == Config.timeDisplayFormatEnum.MINUTES) {
     return (seconds/60).toFixed(2);
@@ -39,6 +41,7 @@ function secondsToString(seconds) {
   return s;
 }
 
+//Creates the table display in the popup
 function addLocalDisplay() {
   var old_tbody = document.getElementById("stats_tbody");
   var tbody = document.createElement("tbody");
@@ -47,9 +50,9 @@ function addLocalDisplay() {
 
   /* Sort sites by time spent */
   var sites = gsites.sites;
-  var sortedSites = new Array();
+  var sortedSites = [];
   var totalTime = 0;
-  for (site in sites) {
+  for (var site in sites) {
    sortedSites.push([site, sites[site]]);
    totalTime += sites[site];
   }
diff --git a/extension/sites.js b/extension/sites.js
index 85331c0..02c1650 100644
--- a/extension/sites.js
+++ b/extension/sites.js
@@ -3,6 +3,7 @@
  *
  * The primary interface to this class is through setCurrentFocus.
  */
+ //Note: Can probable use as is with no changes
 function Sites(config) {
   this._config = config;
   if (!localStorage.sites) {
@@ -68,7 +69,7 @@ Sites.prototype._updateTime = function() {
 Sites.prototype.setCurrentFocus = function(url) {
   console.log("setCurrentFocus: " + url);
   this._updateTime();
-  if (url == null) {
+  if (url === null) {
     this._currentSite = null;
     this._startTime = null;
   } else {
diff --git a/extension/tracker.js b/extension/tracker.js
index 957dbca..b6c3125 100644
--- a/extension/tracker.js
+++ b/extension/tracker.js
@@ -1,6 +1,8 @@
 /**
  * Responsible for detecting focus change from tabs and windows.
  */
+ //Note: Can probable use as is with no changes
+
 function Tracker(config, sites) {
   this._sites = sites;
   var self = this;