Where is the little menu on top of the new window?

[AC Question]

When already in the browser and we click on something to open up a new window, sometimes there's a lil "menu" that is at top of that new window. But sometimes it doesn't appear, why?
The little menu includes to expand and close the new window...

 

[B. Diddy]

Welcome to Android Central! Which device, and which browser are you using? Are you talking about the view that allows you to see all of your open tabs?