diff --git a/background.js b/background.js
index e167dcd..e037256 100644
--- a/background.js
+++ b/background.js
@@ -13,52 +13,50 @@ chrome.runtime.onInstalled.addListener(function() {
     });
 });
 
-chrome.tabs.onUpdated.addListener(
-    function(tabId, changeInfo, tab) {
-        chrome.storage.sync.get('switchValue', function(data) {
-            value = data.switchValue;
-            if(value){
-                const code = `(function getUrls(){
-                    const songName = document.querySelector('yt-formatted-string[class="title style-scope ytmusic-player-bar"]') 
-                      ? document.querySelector('yt-formatted-string[class="title style-scope ytmusic-player-bar"]').title
-                      : undefined;
-                    const songInfo = document.querySelector('yt-formatted-string[class="byline style-scope ytmusic-player-bar complex-string"]') 
-                      ? document.querySelector('yt-formatted-string[class="byline style-scope ytmusic-player-bar complex-string"]').title
-                      : undefined;
-                    return { songName, songInfo };
-                })()`;
+chrome.tabs.onUpdated.addListener(function(tabId, changeInfo, tab) {
+    chrome.storage.sync.get('switchValue', function(data) {
+        value = data.switchValue;
+        if(value){
+            const code = `(function getUrls(){
+                const songName = document.querySelector('yt-formatted-string[class="title style-scope ytmusic-player-bar"]') 
+                    ? document.querySelector('yt-formatted-string[class="title style-scope ytmusic-player-bar"]').title
+                    : undefined;
+                const songInfo = document.querySelector('yt-formatted-string[class="byline style-scope ytmusic-player-bar complex-string"]') 
+                    ? document.querySelector('yt-formatted-string[class="byline style-scope ytmusic-player-bar complex-string"]').title
+                    : undefined;
+                return { songName, songInfo };
+            })()`;
 
-                const ytmusicURLs = ['www.music.youtube.com','music.youtube.com'];
-                if(tab.status == 'complete' && ytmusicURLs.some(url => tab.url.includes(url))){
-                    setTimeout(() => {
-                        chrome.tabs.executeScript(tabId, { code }, function(result) {
-                            const { songName, songInfo } = result[0];
-                            notHandle = true;
-                            chrome.storage.sync.get('oldSongInfo', function(songData) {
-                                if(songData.oldSongInfo.localeCompare(`${songName}\n${songInfo}`)===0){
-                                    notHandle = false;
+            const ytmusicURLs = ['www.music.youtube.com','music.youtube.com'];
+            if(tab.status == 'complete' && ytmusicURLs.some(url => tab.url.includes(url))){
+                setTimeout(() => {
+                    chrome.tabs.executeScript(tabId, { code }, function(result) {
+                        const { songName, songInfo } = result[0];
+                        notHandle = true;
+                        chrome.storage.sync.get('oldSongInfo', function(songData) {
+                            if(songData.oldSongInfo.localeCompare(`${songName}\n${songInfo}`)===0){
+                                notHandle = false;
+                            }
+                            else{
+                                notHandle = true;
+                            }
+                            if(songName!=undefined && songInfo!=undefined && notHandle){
+                                chrome.storage.sync.set({'oldSongInfo': `${songName}\n${songInfo}`});
+                                function getNotificationId() {
+                                    var id = Math.floor(Math.random() * 9007199254740992) + 1;
+                                    return id.toString();
                                 }
-                                else{
-                                    notHandle = true;
-                                }
-                                if(songName!=undefined && songInfo!=undefined && notHandle){
-                                    chrome.storage.sync.set({'oldSongInfo': `${songName}\n${songInfo}`});
-                                    function getNotificationId() {
-                                        var id = Math.floor(Math.random() * 9007199254740992) + 1;
-                                        return id.toString();
-                                    }
-                                    chrome.notifications.create(getNotificationId(), {
-                                        title: 'Now Playing',
-                                        iconUrl: 'icon128.png',
-                                        type: 'basic',
-                                        message: `${songName}\n${songInfo}`
-                                    }, function() {});
-                                }
-                            });
+                                chrome.notifications.create(getNotificationId(), {
+                                    title: 'Now Playing',
+                                    iconUrl: 'icon128.png',
+                                    type: 'basic',
+                                    message: `${songName}\n${songInfo}`
+                                }, function() {});
+                            }
                         });
-                    }, 2000);
-                }
+                    });
+                }, 2000);
             }
-        });
-    }
-);
\ No newline at end of file
+        }
+    });
+});
\ No newline at end of file