When I discover that I have already bookmarked a URL, I want to easily discover in which of my folder(s) I have saved the bookmark. In some cases, the hosting site morphs the bookmarked URL with a redirect, so I am unable to discover the containing folder by browsing to the URL. Sigh. I would also like to discover situations where I have already bookmarked a single URL in several different folders. I have downloaded the JSON for my bookmarks file and parsed the JSON. I now know that I have 7388 URLs bookmarked which are saved across 111 folders. I am having trouble discovering the parent/child relationships between the various folders in which the bookmarks are saved. I have several situations where child folders have the same names and can be identified only when the child's parent folder is known. Undated Firefox documentation at [[https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/bookmarks/BookmarkTreeNode#parentid|https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/bookmarks/BookmarkTreeNode#parentid]] suggests that each node in the bookmark tree should have a parentid and an index. I see an index but I do not see a parentid. I do see a GUID field. I have seen comments suggesting that parentid has been replaced by GUID. But the values I see (GUID=FqNNI0k91ZjW, for example) do not make sense and have no connection to the ID fields (ID=2658, for example). Can anyone help me make sense of the GUID values I am seeing? Are GUIDs now being hashed for some reason?