Use case or problem
I like to build pretty complex Bookmarks group hierarchies. I also like to drag and drop bookmarks between distant parts of this structure. Unfortunately doing so causes the view within the hierarchy to be lost.
If it were possible to have two separate instances of the Bookmarks tab open simultaneously, it would make the process of repeatedly moving bookmarks between distant parts of the hierarchy much easier. This would also be useful for copying bookmarks (see request: Copy existing bookmarks via drag and drop)