diff --git a/stable.user.js b/stable.user.js
index afc0810..ff1d2fe 100755
--- a/stable.user.js
+++ b/stable.user.js
@@ -49,8 +49,7 @@
 // @version      2.1.0.1
 // @description  Online Moodle/Elearning/KMOOC test help
 // @author       MrFry
-// @match        https://elearning.uni-obuda.hu/main/*
-// @match        https://elearning.uni-obuda.hu/kmooc/*
+// @match        https://elearning.uni-obuda.hu/*
 // @match        https://mooc.unideb.hu/*
 // @match        https://itc.semmelweis.hu/moodle/*
 // @match        https://oktatas.mai.kvk.uni-obuda.hu/*
@@ -1255,6 +1254,7 @@
     }
     if (!installedFromCorrectSource(correctSource)) {
       greetMsg.push(texts.reinstallFromCorrectSource)
+      console.log(`update url:${info().script.updateURL}`)
     }
     if (showMOTD) {
       greetMsg.push(texts.motd + motd)
@@ -1563,8 +1563,8 @@
       return
     }
 
-    let currOpacity = getVal(`${elem.id}_opacity`)
-    elem.addEventListener('mousewheel', e => {
+    let currOpacity = getVal(`${elem.id}_opacity`) || 1
+    elem.addEventListener('wheel', e => {
       e.preventDefault()
       const isUp = e.deltaY < 0
       if (isUp) {