From de9919acd8f2ccd8bab94e0b214e05fade0b079a Mon Sep 17 00:00:00 2001
From: Kevin Lee <kevin@infinite-lee.com>
Date: Thu, 23 Aug 2018 11:51:48 -0700
Subject: [PATCH] add back in preventDefault in case of scrolling while holding
 alt key

---
 src/utils/mouse-events-handler.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/utils/mouse-events-handler.js b/src/utils/mouse-events-handler.js
index 1fde2e203..96ee64aa6 100644
--- a/src/utils/mouse-events-handler.js
+++ b/src/utils/mouse-events-handler.js
@@ -107,6 +107,8 @@ export default class MouseEventsHandler {
       this.superHand.el.emit("horizontal_scroll_release");
       this.lastHorizontalScrollTime = Date.now();
     }
+
+    if (e.altKey) e.preventDefault(); //prevent forward/back on firefox
   }
 
   getScrollMod(delta, deltaMode) {
-- 
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