From 6aedc8bff5dbee318146c64fa153cbe4af845ff0 Mon Sep 17 00:00:00 2001
From: Simon Kornblith <simon@simonster.com>
Date: Thu, 16 Feb 2012 16:03:07 -0500
Subject: [PATCH] Prevent inconsequential error

---
 chrome/content/zotero/xpcom/standalone.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/chrome/content/zotero/xpcom/standalone.js b/chrome/content/zotero/xpcom/standalone.js
index c6f654a9e..9e60fd244 100644
--- a/chrome/content/zotero/xpcom/standalone.js
+++ b/chrome/content/zotero/xpcom/standalone.js
@@ -79,8 +79,12 @@ Zotero.Standalone = new function() {
 			getService(Components.interfaces.nsIObserverService).
 			addObserver({
 				"observe":function(ch) {
-					if(ch.QueryInterface(Components.interfaces.nsIRequest).URI.host
-						!== "versioncheck.addons.mozilla.org") return;
+					try {
+						if(ch.QueryInterface(Components.interfaces.nsIRequest).URI.host
+							!== "versioncheck.addons.mozilla.org") return;
+					} catch(e) {
+						return;
+					}
 					var newListener = new AMOStreamListener;
 					newListener.oldListener = ch.
 						QueryInterface(Components.interfaces.nsITraceableChannel).