Bookmarks can appear in the "[[Customize your New Tab page to hide or display content|Recent activity]]" section.

The checkbox for showing the Bookmarks Toolbar is a sub menu with three choices: *"Always Show", "Only Show on New Tab", "Never Show" "Only Show on New Tab" only applies to the "about:newtab" and "about:home" pages, so won't work when the new tab page is not set to the default Firefox Home screen. *https://support.mozilla.org/en-US/kb/customize-firefox-controls-buttons-and-toolbars You can drag the Bookmarks Menu button [[Image:Bookmark Menu icon (star on tray)|width=16]] that shows the bookmarks in a drop-down list and drag the Library button that gives access to recent bookmarks and history from the Customize palette to the Navigation Toolbar. The Bookmarks Menu button has a "View bookmarks sidebar" menu item. See "How do I add the Bookmarks Menu button to the toolbar?" *https://support.mozilla.org/en-US/kb/bookmarks-firefox *https://support.mozilla.org/en-US/kb/use-firefox-sidebar-access-bookmarks-history-synced