From fbbb09cddc87343270d753293133cabba756c6e6 Mon Sep 17 00:00:00 2001
From: "YUKI \"Piro\" Hiroshi" <piro.outsider.reflex@gmail.com>
Date: Sat, 16 Jul 2016 23:02:25 +0900
Subject: [PATCH] Shrink scope of a short-live variable

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

diff --git a/modules/window.js b/modules/window.js
index bbc7bfb4..1a352e76 100644
--- a/modules/window.js
+++ b/modules/window.js
@@ -98,7 +98,7 @@ function TreeStyleTabWindow(aWindow)
 
 	var isDevEdition = this.window.AppConstants.MOZ_DEV_EDITION;
 	if (isDevEdition) {
-		var rootelem = this.document.documentElement;
+		let rootelem = this.document.documentElement;
 		rootelem.setAttribute('treestyletab-devedition', true);
 	}