If you want to let your visitor want to open a new window with a single click on a button, here is the Live Preview and SourceCode. For security purpose, the browser will not allow to make the URL disappear, but the address is non-editable. If you are a Developer and want to show your work in Full Screen Live Preview, it may be useful for you.

Simply replace the URL. Remember that, the Button style will automatically match with your website's Style.