Note that Bug 419713 which was marked as a duplicate has some workarounds in "Open Book" extension, and customizable in User style 9029. Keywords should should also show from Organize Bookmarks (bottom), the location bar star, and of course Ctrl+D. Mentioned particularly because in Organize Bookmarks Description etc will take up space from main list, so would want specific control there of what appears there before using the More button.
Note that Bug 419713 which was marked as a duplicate has some workarounds in "Open Book" extension, and customizable in User style 9029. Keywords should should also show from Organize Bookmarks (bottom), the location bar star, and of course Ctrl+D. Mentioned particularly because in Organize Bookmarks Description etc will take up space from main list, so would want specific control there of what appears there before using the More button.