From 10740a28ff5c7c5966d8a633c3d361227d9985a6 Mon Sep 17 00:00:00 2001
From: gorhill <rhill@raymondhill.net>
Date: Mon, 1 Jun 2015 08:11:25 -0400
Subject: [PATCH] this fixes console warning when view-source:

---
 platform/firefox/vapi-background.js | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/platform/firefox/vapi-background.js b/platform/firefox/vapi-background.js
index b8d5bf711..b99854886 100644
--- a/platform/firefox/vapi-background.js
+++ b/platform/firefox/vapi-background.js
@@ -415,15 +415,22 @@ vAPI.tabs.registerListeners = function() {
 //   currentURI
 //   ownerDocument (XULDocument)
 //     defaultView (ChromeWindow)
-//     gBrowser (tabbrowser)
+//     gBrowser (tabbrowser OR browser)
 //       browsers (browser)
 //       selectedBrowser
 //       selectedTab
 //       tabs (tab.tabbrowser-tab)
 //
-// Fennec:
+// Fennec: (what I figured so far)
 //
-// ???
+//   tab --> browser     windows --> window --> BrowserApp --> tabs --+
+//    ^      window                                                   |
+//    |                                                               |
+//    +---------------------------------------------------------------+
+//
+// tab
+//   browser
+// [manual search to go back to tab from list of windows]
 
 vAPI.tabs.get = function(tabId, callback) {
     var win, browser;
@@ -691,6 +698,12 @@ var tabWatcher = (function() {
         if ( !tabbrowser ) {
             return -1;
         }
+        // This can happen, for example, the `view-source:` window, there is
+        // no tabbrowser object, the browser object sits directly in the
+        // window.
+        if ( tabbrowser === browser ) {
+            return 0;
+        }
         return vAPI.fennec ? 
             tabbrowser.tabs.indexOf(browser) :
             tabbrowser.browsers.indexOf(browser);
@@ -2058,7 +2071,7 @@ vAPI.contextMenu.create = function(details, callback) {
         if ( gContextMenu.inFrame ) {
             details.tagName = 'iframe';
             // Probably won't work with e10s
-            details.frameUrl = gContextMenu.focusedWindow.location.href;
+            details.frameUrl = gContextMenu.focusedWindow && gContextMenu.focusedWindow.location.href || '';
         } else if ( gContextMenu.onImage ) {
             details.tagName = 'img';
             details.srcUrl = gContextMenu.mediaURL;