From 21e677346db19295162f31947b05bb51dbf1a8d6 Mon Sep 17 00:00:00 2001
From: Kris Maglione <maglione.k@gmail.com>
Date: Tue, 9 Nov 2010 17:37:51 -0500
Subject: [PATCH] Fix bug.

---
 common/content/editor.js | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/common/content/editor.js b/common/content/editor.js
index 7760fcf4..c00242ae 100644
--- a/common/content/editor.js
+++ b/common/content/editor.js
@@ -382,9 +382,14 @@ const Editor = Module("editor", {
 
         if (elem instanceof Element)
             return elem.QueryInterface(Ci.nsIDOMNSEditableElement).editor;
-        return elem.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIWebNavigation)
-                   .QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIEditingSession)
-                   .getEditorForWindow(elem);
+        try {
+            return elem.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIWebNavigation)
+                       .QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIEditingSession)
+                       .getEditorForWindow(elem);
+        }
+        catch (e) {
+            return null;
+        }
     },
 
     getController: function () {