diff --git a/scripts/GUI/tabs.js b/scripts/GUI/tabs.js
index d0a9f90..1eb1454 100644
--- a/scripts/GUI/tabs.js
+++ b/scripts/GUI/tabs.js
@@ -1,6 +1,6 @@
 export default class Tabs {
      static addActionListener(event, callback) {
-		(event.toLowerCase().contains(`update`)) ? chrome.tabs.onUpdated.addListener(async (tabId, info, tab) => {callback({"tabId": tabId, "info": info, "tab": tab})}) : false;
+		(event.toLowerCase().includes(`update`)) ? chrome.tabs.onUpdated.addListener(async (tabId, info, tab) => {callback({"tabId": tabId, "info": info, "tab": tab})}) : false;
 	};
 
      static create(URL, index, pinned = false) {
@@ -23,7 +23,7 @@ export default class Tabs {
           let TABS = {};
 
           TABS.all = await chrome.tabs.query(filters);
-          TABS.result = ((Array.isArray(TABS.all) ? (TABS.all).length > 0 : false) && ((index != null && (typeof index).contains(`num`)) ? index >= 0 : false)) ? TABS.all[index] : ((Array.isArray(TABS.all) ? (TABS.all).length > 0 : false) ? TABS.all : null);
+          TABS.result = ((Array.isArray(TABS.all) ? (TABS.all).length > 0 : false) && ((index != null && (typeof index).includes(`num`)) ? index >= 0 : false)) ? TABS.all[index] : ((Array.isArray(TABS.all) ? (TABS.all).length > 0 : false) ? TABS.all : null);
 
           return (TABS.result);
      }