From c403f8b002fcd10edee99d0498a1067971eb0324 Mon Sep 17 00:00:00 2001
From: Felipe Gomes <felipc@gmail.com>
Date: Fri, 1 Mar 2019 21:07:00 +0000
Subject: [PATCH] Bug 827976 - browser-places.js doesn't need to get a
 reference to the hidden window. r=mak

Differential Revision: https://phabricator.services.mozilla.com/D21080

--HG--
extra : moz-landing-system : lando
---
 browser/base/content/browser-places.js | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/browser/base/content/browser-places.js b/browser/base/content/browser-places.js
index ca6a1390a924..cd58e5880a22 100755
--- a/browser/base/content/browser-places.js
+++ b/browser/base/content/browser-places.js
@@ -572,12 +572,12 @@ HistoryMenu.prototype = {
   },
 
   _getClosedTabCount() {
-    // SessionStore doesn't track the hidden window, so just return zero then.
-    if (window == Services.appShell.hiddenDOMWindow) {
+    try {
+      return SessionStore.getClosedTabCount(window);
+    } catch (ex) {
+      // SessionStore doesn't track the hidden window, so just return zero then.
       return 0;
     }
-
-    return SessionStore.getClosedTabCount(window);
   },
 
   toggleHiddenTabs() {