files/en-us/mozilla/add-ons/webextensions/api/bookmarks/bookmarktreenodeunmodifiable/index.md
The bookmarks.BookmarkTreeNodeUnmodifiable type is used to indicate the reason that a node in the bookmark tree (where each node is either a bookmark or a bookmark folder) cannot be changed. This is used as the value of the {{WebExtAPIRef("bookmarks.BookmarkTreeNode", "bookmarks.BookmarkTreeNode.unmodifiable", "unmodifiable")}} field on bookmark nodes.
bookmarks.BookmarkTreeNodeUnmodifiable is a {{jsxref("string")}} which can currently have only one value: "managed". This indicates that the bookmark node was configured by an administrator or by the custodian of a supervised user (such as a parent, in the case of parental controls).
{{WebExtExamples}}
{{Compat}}
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chrome.bookmarksAPI. This documentation is derived frombookmarks.jsonin the Chromium code.