From 52b1a20bcfe52f1629c0b96f45573588f490f635 Mon Sep 17 00:00:00 2001
From: FranklinDM <mrmineshafter17@gmail.com>
Date: Wed, 12 May 2021 14:21:12 +0800
Subject: [PATCH] Issue #1770 - Fix incorrect reference to event parameter

---
 toolkit/content/widgets/browser.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/toolkit/content/widgets/browser.xml b/toolkit/content/widgets/browser.xml
index 11ed998cca..b039e9b1f7 100644
--- a/toolkit/content/widgets/browser.xml
+++ b/toolkit/content/widgets/browser.xml
@@ -1199,7 +1199,7 @@
               }
               case "DOMMouseScroll": {
                 this._autoScrollPopup.hidePopup();
-                event.preventDefault();
+                aEvent.preventDefault();
                 break;
               }
               case "popuphidden": {