From c3efa9bd13eaa5958c1a884150e0b156cf79a3c1 Mon Sep 17 00:00:00 2001
From: YUKI Hiroshi <shimoda@clear-code.com>
Date: Fri, 12 Feb 2016 19:27:51 +0900
Subject: [PATCH] Don't replace parent tab with group tab if it ls already
 replaced

---
 modules/browser.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/modules/browser.js b/modules/browser.js
index a352645a..78ef9a49 100644
--- a/modules/browser.js
+++ b/modules/browser.js
@@ -5762,7 +5762,8 @@ TreeStyleTabBrowser.prototype = inherit(TreeStyleTabWindow.prototype, {
 			insertBefore = this.getNextSiblingTab(this.getRootTab(aTab));
 		}
 
-		if (aInfo.behavior == this.kCLOSE_PARENT_BEHAVIOR_REPLACE_WITH_GROUP_TAB) {
+		if (aInfo.behavior == this.kCLOSE_PARENT_BEHAVIOR_REPLACE_WITH_GROUP_TAB &&
+			!this.isGroupTab(aTab)) {
 			let uri = this.getGroupTabURI({
 				title:     aTab.label,
 				temporary: true