You can return to the previously visited pages by using the button at the top of this window.
You can also press Alt+Left arrow to obtain the same effect.
Conversely, you can move forward on the list of previously visited pages by pressing Alt+Right arrow (i.e. in the same way as you do it in Internet Explorer)
Hint: Try it now! Press Alt+Left arrow first and then follow it with Alt+Right arrow to return to this page.