Make the browser window fullscreen
On a Windows computer, you can set Google Chrome, Internet Explorer, Microsoft Edge, or Mozilla Firefox to full-screen mode, hiding the toolbars and address bar by pressing the F11 key. To reverse this action and show these items again, press F11 again.
If pressing F11 does not have any effect, you may need to press the Fn key, and while pressing that key, press F11.
In full-screen mode on a Mac, the browser's address bar and toolbars are still displayed.