Address bar in always included

[smartm0use]

Hello, I'm using your library to keep focus on modal dialogs. It works, the users can tab only within modal element, they can't move to the element of the page that lays under the modal.

Anyway I noticed that they can tab on address bar of the browser as well. In addition, if I keep the Chrome Developer Tools open, users can go there. These two behaviours don't happen with Bootstrap's modal.

Can please fix this?