From 6a5b7fdb1f1fcfb9627ffd639a55f272c240aa4e Mon Sep 17 00:00:00 2001
From: Florian Queze <florian@queze.net>
Date: Wed, 19 Apr 2017 13:37:09 +0200
Subject: [PATCH] Bug 1349742 - avoid initializing UITour whenever about:home
 is loaded, r=MattN.

---
 browser/components/uitour/UITour.jsm | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/browser/components/uitour/UITour.jsm b/browser/components/uitour/UITour.jsm
index a492fa46e36b..8095635f9960 100644
--- a/browser/components/uitour/UITour.jsm
+++ b/browser/components/uitour/UITour.jsm
@@ -662,7 +662,12 @@ this.UITour = {
       }
     }
 
-    this.initForBrowser(browser, window);
+    // For performance reasons, only call initForBrowser if we did something
+    // that will require a teardownTourForBrowser call later.
+    // getConfiguration (called from about:home) doesn't require any future
+    // uninitialization.
+    if (action != "getConfiguration")
+      this.initForBrowser(browser, window);
 
     return true;
   },