From a51697a1ddebf1250f9e59fbf2e1df3a4d805bc5 Mon Sep 17 00:00:00 2001
From: Nicolas Gallagher <nicolasgallagher@gmail.com>
Date: Sun, 20 Jan 2013 09:23:49 -0800
Subject: [PATCH] Normalize `hr`

Firefox uses different `box-sizing` and `height` values to all other
browsers. Firefox doesn't currently support `box-sizing` without the
`-moz-` prefix, so we use both the vendor-prefixed and unprefixed
properties to ensure that it matches the `content-box` value of other
browsers. It also requires the `height` to be set to `0`.

Known issue: this does not normalize IE 6/7 as `hr` cannot be reliably
styled in those browsers.
---
 normalize.css | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/normalize.css b/normalize.css
index e418de5..bc5d818 100644
--- a/normalize.css
+++ b/normalize.css
@@ -182,6 +182,17 @@ dfn {
     font-style: italic;
 }
 
+/**
+ * Address differences between Firefox and other browsers.
+ * Known issue: no IE 6/7 normalization.
+ */
+
+hr {
+    -moz-box-sizing: content-box;
+    box-sizing: content-box;
+    height: 0;
+}
+
 /**
  * Address styling not present in IE 6/7/8/9.
  */