What is the small square box with a number inside to the right of the address bar on a web site?

[Android Central Question]

It is a tiny square box next to long rectangular address box, on the right of it, with a number, and when you press it, you are shown sites or pages recently opened that can be closed by pressing an x icon in the corner.

 

[chanchan05]

It's the shortcut to the tabs you have open.

It is a tiny square box next to long rectangular address box, on the right of it, with a number, and when you press it, you are shown sites or pages recently opened that can be closed by pressing an x icon in the corner.