From 3480247348392ea44ff6a0b9aec5c6a9043593df Mon Sep 17 00:00:00 2001
From: BryanTheCrow <bcrow@wonderhowto.com>
Date: Tue, 15 Jul 2014 13:34:55 -0700
Subject: [PATCH] Fix Issue #577 - Scrolling way too slow in Firefox

This ensures that scroll speed is normal (instead of painfully slow) in the latest versions of Firefox
---
 src/wheel/wheel.js | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/wheel/wheel.js b/src/wheel/wheel.js
index 6f6ade3a..ce37a20e 100644
--- a/src/wheel/wheel.js
+++ b/src/wheel/wheel.js
@@ -35,8 +35,13 @@
 		}, 400);
 
 		if ( 'deltaX' in e ) {
-			wheelDeltaX = -e.deltaX;
-			wheelDeltaY = -e.deltaY;
+			if (e.deltaMode === 1) {
+				wheelDeltaX = -e.deltaX * this.options.mouseWheelSpeed;
+				wheelDeltaY = -e.deltaY * this.options.mouseWheelSpeed;
+			} else {
+				wheelDeltaX = -e.deltaX;
+				wheelDeltaY = -e.deltaY;
+			}
 		} else if ( 'wheelDeltaX' in e ) {
 			wheelDeltaX = e.wheelDeltaX / 120 * this.options.mouseWheelSpeed;
 			wheelDeltaY = e.wheelDeltaY / 120 * this.options.mouseWheelSpeed;