From 791f9b10f5485bb51843857c5ccec1706a53185e Mon Sep 17 00:00:00 2001
From: XhmikosR <xhmikosr@gmail.com>
Date: Fri, 14 Mar 2014 12:45:34 +0200
Subject: [PATCH] Fix one more error with Firefox.

---
 js/push.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/js/push.js b/js/push.js
index 02d6af5..8d091a1 100644
--- a/js/push.js
+++ b/js/push.js
@@ -60,7 +60,9 @@
       delete cacheMapping[cacheBackStack.shift()];
     }
 
-    window.history.pushState(null, '', getCached(PUSH.id).url);
+    if (getCached(PUSH.id).url) {
+      window.history.pushState(null, '', getCached(PUSH.id).url);
+    }
 
     cacheMapping.cacheForwardStack = JSON.stringify(cacheForwardStack);
     cacheMapping.cacheBackStack    = JSON.stringify(cacheBackStack);