From 97e1ae2eb99f549100a0121b63a570ac98782e92 Mon Sep 17 00:00:00 2001
From: YUKI Hiroshi <shimoda@clear-code.com>
Date: Tue, 19 Jan 2016 18:55:31 +0900
Subject: [PATCH] Restore backuped preference correctly

---
 modules/utils.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/utils.js b/modules/utils.js
index 51c05e0a..8c8c026c 100644
--- a/modules/utils.js
+++ b/modules/utils.js
@@ -225,7 +225,7 @@ var TreeStyleTabUtils = {
 				{
 					prefs.clearPref('browser.tabs.insertRelatedAfterCurrent');
 					let backupValue = prefs.getPref('browser.tabs.insertRelatedAfterCurrent.backup');
-					if (backupValue === null)
+					if (backupValue !== null)
 						prefs.setPref('browser.tabs.insertRelatedAfterCurrent', backupValue);
 				}
 			default: