This is an extension that uses a back button to close your tabs.

It can be used as a workaround for when you have a list of tabs that you want to go back to and you're not sure what page it was.

The developer made a new feature that allows you to customize the key that can be used for closing the tab. You can use any key to close the tab except the Enter key and the Return key.

The Back button feature has an option to close all the tabs of the current page instead of just the one you're on.

The Back button can be disabled by unchecking it in the settings.