From ec97a6079e2445dd44ec95ca09bf9f6ad3403a50 Mon Sep 17 00:00:00 2001
From: Mark Finkle <mfinkle@mozilla.com>
Date: Thu, 4 Nov 2010 21:36:47 -0400
Subject: [PATCH] Bug 609813 - Avoid Browser.computeSidebarVisibility in
 NewTabPopup 'TabOpen' handler [r=mbrubeck]

---
 mobile/chrome/content/browser-ui.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/mobile/chrome/content/browser-ui.js b/mobile/chrome/content/browser-ui.js
index 548757965904..fb1b536b4f34 100644
--- a/mobile/chrome/content/browser-ui.js
+++ b/mobile/chrome/content/browser-ui.js
@@ -1469,8 +1469,12 @@ var NewTabPopup = {
   },
 
   handleEvent: function nt_handleEvent(aEvent) {
+    // Bail early and fast
+    if (!aEvent.detail)
+      return;
+
     let [tabsVisibility,,,] = Browser.computeSidebarVisibility();
-    if (tabsVisibility != 1.0 && aEvent.detail)
+    if (tabsVisibility != 1.0)
       this.show(aEvent.originalTarget);
   }
 };