kd7jhw, unfortunately I am unaware of a straightforward way to do this. One possible method for duplicating a window is to first duplicate all its tabs in the same window, and then move the original tabs to a new window. To do this: * right-click a tab in the tabs bar (the bar is usually at the top of the screen) * select "Select All Tabs" * right-click the same tab * select "Duplicate Tabs" * right-click the same tab * select "Move Tabs" then "Move to New Window" Just make sure not to switch tabs, or do anything else inbetween steps. You can also make a feature request for simpler window duplicating by following the "Share Ideas and Feedback" link in the help menu.