Whenever I open a new window, the Bookmark Sidebar is displayed. I've tried going through Menu, Customize Toobar to remove the icon from the menu bar. That part works. But then the next time I open a window, there's the sidebar. When I went back into Menu, Customize Toobar, the icon wasn't there, so I restored the previous session to bring it back in order to try something else. Nothing worked.

Obviously, the problem isn't with the toolbar, but with a Window setting, but where is THAT information stored? It ain't under Options. It's either so obvious or so obtuse, I'm missing it. Thanks in advance.