need to package onEngagementLoad as you are not allowed to eval() inside of an extension

browser-extension/service-worker.js

@@ -1,11 +1,4 @@
 // Allows users to open the side panel by clicking on the action toolbar icon
 chrome.sidePanel
   .setPanelBehavior({ openPanelOnActionClick: true })
-  .catch((error) => console.error(error));
-
-chrome.action.onClicked.addListener(() => {
-  chrome.tabs.create({
-    url: 'mainpage.html'
-  });
-  console.log('Opened a tab with a sandboxed page!');
-});
+  .catch((error) => console.error(error));