prevent closing

manifest.json

@@ -4,6 +4,7 @@
     "version": "1.0",
     "description": "Chrome extension that implements the 20 20 20 rule",
     "permissions": [
+        "tabs",
         "activeTab",
         "storage"
     ],

popup.js

@@ -9,6 +9,7 @@ var startTime;
 var elapsedTime = 0;
 var isTimerRunning = false;
 
+
 function startTimer() {
     if (!isTimerRunning) {
         startTime = localStorage.getItem("startTime") || Date.now() + 20 * 60 * 1000;
@@ -22,6 +23,21 @@ function startTimer() {
     }
 }
 
+// Prevent the extension from closing on window click
+window.addEventListener("click", function(event) {
+    event.preventDefault();
+});
+
+// Prevent the extension from closing on tab switch
+window.addEventListener("visibilitychange", function(event) {
+    event.preventDefault();
+});
+
+// Keep the extension running even when the window is closed
+window.addEventListener("beforeunload", function(event) {
+    event.preventDefault();
+});
+
 function updateTimer() {
     var currentTime = Date.now();
     elapsedTime = startTime - currentTime;