diff --git a/background.js b/background.js
index 0ee37ab..29ba7b2 100644
--- a/background.js
+++ b/background.js
@@ -1,5 +1,5 @@
 //Only make extension icon visible on YouTube.com
-const youtubeBaseUrl = 'youtube.com'	//lowercase matters
+const youtubeDomainMatch = 'youtube.com'	//lowercase matters
 chrome.runtime.onInstalled.addListener(function() {
 	// Replace all rules ...
 	chrome.declarativeContent.onPageChanged.removeRules(undefined, () => {
@@ -7,7 +7,7 @@ chrome.runtime.onInstalled.addListener(function() {
 		chrome.declarativeContent.onPageChanged.addRules([{
 			conditions: [
 				new chrome.declarativeContent.PageStateMatcher({
-					pageUrl: { hostContains: youtubeBaseUrl },
+					pageUrl: { hostContains: youtubeDomainMatch },
 				})
 			],
 			// And shows the extension's page action
@@ -19,22 +19,22 @@ chrome.runtime.onInstalled.addListener(function() {
 
 const MAGIC_URL_POSTFIX = '&list=ULcxqQ59vzyTk'		//thing to append to make it play chronlogically
 const YOUTUBE_VIDEO_URL_START = 'https://www.youtube.com/watch?v='	//a youtube url without the videoID
-const regexMatchVideoId = /youtube.com\/watch\?v=([^&\?]*)/		//regular expression matches youtube.com/watch?v=[VIDEO_ID]	& captures the video ID since the ID is either the end of the string or ends at a question mark or ampersand
+const regexToExtractVideoId = /youtube.com\/watch\?v=([^&\?]*)/i		//regular expression matches youtube.com/watch?v=[VIDEO_ID]	& captures the video ID since the ID is either the end of the string or ends at a question mark or ampersand
 
-//Browser action instead of popup
+//Run code on page action instead of popup
 chrome.pageAction.onClicked.addListener(tab=>{
 	appendToUrl()
 })
 
 function appendToUrl(){
-	chrome.tabs.query({'active': true, 'lastFocusedWindow': true}, tabs=>{
+	chrome.tabs.query({'active': true, 'lastFocusedWindow': true}, tabs=>{	//Get current tab
 		let currentTab = tabs[0]
 		let oldURL = currentTab.url
-		let regexMatch = oldURL.match(regexMatchVideoId)
+		let regexMatch = oldURL.match(regexToExtractVideoId)
 		if(!regexMatch){	//not a valid youtube video URL (prevents keyboard shotcut override)
 			return
 		}
-		let videoId = regexMatch[1]	//get video id
+		let videoId = regexMatch[1]		//get video id from regex match
 		let newUrl = YOUTUBE_VIDEO_URL_START + videoId + MAGIC_URL_POSTFIX
 		chrome.tabs.update(currentTab.id, {url: newUrl})	//update tab/reloads page with new location
 	})
diff --git a/manifest.json b/manifest.json
index 9195cab..fe53c90 100644
--- a/manifest.json
+++ b/manifest.json
@@ -3,8 +3,8 @@
 	
 	"name": "YouTube Chronological Order",
 	"description": "Watch all videos from a channel in chronological order",
-	"version": "1.0.0",
-	"version_name": "1.0.0", 
+	"version": "1.0.1",
+	"version_name": "1.0.1", 
 
 	"page_action": {
 		"default_icon" : "assets/icons/chronological-icon-16.png",