Fire Fox is shown in the Task Bar. When selected, a new tab opens the desktop. I prefer using the shortcut display under the Fire Fox logo with two rows of internet selections. When the Task Bar Fire Fox icon is selected, Fire Fox opens as expected. However, if I select any item on the open page, a second Fire Fox icon appears in the taskbar but without the same pinned shortcuts on the preferred Fire Fox page. How is this second, unwanted page to be removed.

I've read about this problem in posts that are twenty years old and hesitate to follow that advice. Thank you in advance for a solution to this annoying problem.