From bc9e8794e5a08f10f4852aff7eadd689444f458d Mon Sep 17 00:00:00 2001
From: Kris Maglione <maglione.k@gmail.com>
Date: Mon, 20 Dec 2010 17:03:35 -0500
Subject: [PATCH] Fix odd "gi" corner case.

---
 common/content/buffer.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/common/content/buffer.js b/common/content/buffer.js
index a4718b18..d42691ca 100644
--- a/common/content/buffer.js
+++ b/common/content/buffer.js
@@ -381,7 +381,10 @@ const Buffer = Module("buffer", {
      * @property {Node} The last focused input field in the buffer. Used
      *     by the "gi" key binding.
      */
-    get lastInputField() this.localStore.lastInputField && this.localStore.lastInputField.get() || null,
+    get lastInputField() {
+        let field = this.localStore.lastInputField && this.localStore.lastInputField.get();
+        return field && field.ownerDocument == field.ownerDocument.defaultView.document ? field : null;
+    },
     set lastInputField(value) { this.localStore.lastInputField = value && Cu.getWeakReference(value); },
 
     /**