From 0a736dc270c2c63ee6e5a7b8e3f4ca8a04180ef8 Mon Sep 17 00:00:00 2001
From: AlexVallat <github@alex.vallat.name>
Date: Mon, 30 Mar 2015 09:00:35 +0100
Subject: [PATCH] Fix for #1122

---
 platform/firefox/vapi-background.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/platform/firefox/vapi-background.js b/platform/firefox/vapi-background.js
index bc1ca67..907bafd 100644
--- a/platform/firefox/vapi-background.js
+++ b/platform/firefox/vapi-background.js
@@ -338,7 +338,8 @@ var tabWatcher = {
             return;
         }
 
-        if ( browser.webNavigation.busyFlags === 0  /*BUSY_FLAGS_NONE*/ ) {
+        if ( browser.webNavigation.busyFlags === 0 || /*BUSY_FLAGS_NONE*/ 
+             browser.webNavigation.busyFlags === undefined) {
             vAPI.tabs.onNavigation({
                 frameId: 0,
                 tabId: tabId,