5점중 4점 받음

I was looking for exactly this feature!

My only comment would be: why not switch the functionality of both buttons? So that the top button closes the entire window and the smaller button below it closes the tab? I would like it even better in that way...

Anyway, good job!

이 검토는 현재 부가 기능의 이전 (1.1) 버전에 대한 것입니다. 

Close Button should allow you to get the behavior you want.