diff --git a/stable.user.js b/stable.user.js
index 76e614a..63e9b64 100755
--- a/stable.user.js
+++ b/stable.user.js
@@ -46,7 +46,7 @@
 // : Script header {{{
 // ==UserScript==
 // @name         Moodle/Elearning/KMOOC test help
-// @version      2.1.3.11
+// @version      2.1.3.12
 // @description  Online Moodle/Elearning/KMOOC test help
 // @author       MrFry
 // @match        https://elearning.uni-obuda.hu/*
@@ -1279,6 +1279,7 @@
   }
 
   // : }}}
+
   // : Misc {{{
 
   function getVideo() {
@@ -1448,10 +1449,17 @@
   // window.addEventListener("load", () => {})
   Main()
 
+  function preventWindowClose() {
+    usf.close = () => {
+      log('Prevented window.close() ...')
+    }
+  }
+
   function Main() {
     'use strict'
 
     log('Moodle / E-Learning script')
+    preventWindowClose()
 
     if (document.readyState === 'loading') {
       document.addEventListener('DOMContentLoaded', Init)
@@ -1765,7 +1773,7 @@
     SafeGetElementById('retryContainer', (elem) => {
       elem.style.display = 'flex'
     })
-    log(texts.noServerConsoleMessage)
+    warn(texts.noServerConsoleMessage)
   }
 
   function VersionActions() {
@@ -2728,23 +2736,23 @@
     }
   }
 
-  function logHelper(logMethod, ...value) {
+  function logHelper(logMethod, style, ...value) {
     if (logEnabled) {
-      logMethod('[Moodle Script]: ', ...value)
+      logMethod('%c[Moodle Script]:', style, ...value)
     }
   }
 
   function warn(value) {
-    logHelper(console.warn, value)
+    logHelper(console.warn, 'color:yellow', value)
   }
 
   function log() {
-    logHelper(console.log, ...arguments)
+    logHelper(console.log, 'color:green', ...arguments)
   }
 
   function debugLog() {
     if (isDevel) {
-      logHelper(console.log, ...arguments)
+      logHelper(console.log, 'color:grey', ...arguments)
     }
   }