From 3663519efdfcf01d6717ade70b9ce56f935fa75b Mon Sep 17 00:00:00 2001
From: YUKI Hiroshi <shimoda@clear-code.com>
Date: Wed, 19 Nov 2014 12:25:39 +0900
Subject: [PATCH] Return the current browser immediately if possible

---
 modules/base.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/modules/base.js b/modules/base.js
index e7709cc8..a38cceae 100644
--- a/modules/base.js
+++ b/modules/base.js
@@ -1262,6 +1262,9 @@ var TreeStyleTabBase = inherit(TreeStyleTabConstants, {
  
 	getBrowserFromTabBrowserElements : function TSTBase_getBrowserFromTabBrowserElements(aTarget) 
 	{
+		var currentBrowser = this.browser.selectedTab.linkedBrowser;
+		if (!aTarget)
+			return currentBrowser;
 		if (aTarget == '[object XULElement]') {
 			if (aTarget.localName == 'tab')
 				return aTarget.linkedBrowser;
@@ -1280,7 +1283,7 @@ var TreeStyleTabBase = inherit(TreeStyleTabConstants, {
 			if (tab)
 				return tab.linkedBrowser;
 		}
-		return this.browser.selectedTab.linkedBrowser;
+		return currentBrowser;
 	},
   
 /* get tab(s) */