From 10e669904f277d66f5ef15743256a59caa01cc15 Mon Sep 17 00:00:00 2001
From: mrmr1993
Date: Tue, 16 Dec 2014 04:22:43 +0000
Subject: Use a tolerance when checking scrolling to fix zoomed scrolls

---
 content_scripts/scroller.coffee | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/content_scripts/scroller.coffee b/content_scripts/scroller.coffee
index 5eb1c5e2..d3716a46 100644
--- a/content_scripts/scroller.coffee
+++ b/content_scripts/scroller.coffee
@@ -39,7 +39,8 @@ performScroll = (element, direction, amount) ->
   axisName = scrollProperties[direction].axisName
   before = element[axisName]
   element[axisName] += amount
-  element[axisName] == amount + before
+  scrollChange = element[axisName] - before
+  Math.abs(scrollChange - amount) <= 4 # At 25% zoom the scroll can be off by as much as 4.
 
 # Test whether `element` should be scrolled. E.g. hidden elements should not be scrolled.
 shouldScroll = (element, direction) ->
-- 
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