This is a great extension, one that I've been using for years, but the last update has MAJOR problems. It stoppped working on Firefox ESR 115.7.0esr (64-bits), the workaround suggested by its creator didn't do anything. On Firefox 122.0 (64-bits), the extension was apparently ok, but then I used that workaround giving permissions to "Read and modify bookmarks" preemptively and all my bookmarks were gone. DO NOT USE THE WORKAROUND.