diff --git a/components/AboutGroup.js b/components/AboutGroup.js
index eb3012c4..9db0888d 100644
--- a/components/AboutGroup.js
+++ b/components/AboutGroup.js
@@ -52,12 +52,9 @@ AboutGroup.prototype = {
 		//version(type:number)
 		const version=(versionString.split(".")[0])-0;
 		
-		dump("hello! this firefox version is"+version);
 		if( version < 48 ){
-			dump("hello! this firefox newChannel 48 < ");
 			return Services.io.newChannel('chrome://treestyletab/content/group.xul', null, null);
 		}else{
-			dump("hello! this firefox newChannel2 48 >");
 			return Services.io.newChannel2(
 				'chrome://treestyletab/content/group.xul',
 				null,