This add-on will add a new column to the right panel in Bookmarks &gt; Organize Bookmarks: Show Pare

This add-on will add a new column to the right panel in Bookmarks > Organize Bookmarks: Show Parent Folder: https://addons.mozilla.org/en-US/firefox/addon/7372/

After installation and restarting Firefox, -in Bookmarks > Organize Bookmarks, click Views > Show Columns, click Parent Folder. You can drag the column headings in the right panel to order them to your preference. -also see Options in Tools > Add-ons > Extensions, click on Show Parent Folder, click Options.