In the folder tree of the Library window (bookmark and history) and in the folder tree of the "Edit This Bookmark/New Bookmark" dialogue, after a folder is expanded, it won't collapse until the user manually clicks again on its expando button. Overtime, in a large folder tree, a lazy user like me may have lots of expanded folders waiting to be collapsed. So, I am looking for an extension that can auto-collapse the last expanded folder, or at least adds a "Close All folders" button into the afore-mentioned window/dialogue. I know the "Autoclose Bookmark&History Folders" extension. But it only deals with the side bar.