This extension adds a new Go Parent Folder item to the bookmark context menu in the Bookmarks Manager and the Library windows, and in the Bookmarks Sidebar. Calling of this menu item makes the parent folder of the selected bookmark current (in the left hand part of window), and moves it inside of window, if it was outside of it before.
This is especially useful, when viewing bookmark search results, where all found bookmarks are shown as a flat list, and exact location of any of it is unknown.
The home page of Search Engine Editor is http://yup.lh1.in/AddOns/GoParentFolder/
Also I hope it will be available soon at https://addons.palemoon.org/addon/goparentfolder/
Note for Pale Moon users:
The proposed extension is a continuation of the ancient "Go Parent Folder" extension with fixes and improvements.
At the same time original extension is currently embedded into Pale Moon, so a separate extension looks redundant.
But new extension has its own advantages, because predecessor does not work in some situation, and Pale Moon inherited these flaws. So even Pale Moon users can benefit from the new extension.
(However, all these improvements can be easily transferred to Pale Moon code.)