See this KB article: https://support.mozilla.org/en-US/kb/sort-bookmarks-quickly-find-ones-you-want '''Notes:''' * "Views" > Sort is temporary. * '''Sort By Name''' works per folder. Only the highlighted folder gets sorted. The sub-folders below the highlighted folder don't get sorted; that would need to be done with each folder highlighted by itself. * The Sort Order is alpha-sorted Folders first, followed by alpha-sorted "loose" bookmarks. ''iirc they don't intermix by alpha-sort order''