Make sure that toolbars like the "Navigation Toolbar" and the "Bookmarks Toolbar" are visible:

• Firefox > Options
• "View > Toolbars"

Open the Customize window to set which toolbar items to display:

• View > Toolbars > Customize
• Firefox > Options > Toolbar Layout

• Check that the "Bookmarks Toolbar items" is on the Bookmarks Toolbar
• If the "Bookmarks Toolbar items" is not on the Bookmarks Toolbar then drag it back from the toolbar palette in the customize window to the Bookmarks Toolbar

• If missing items are in the toolbar palette then drag them back from the Customize window on the toolbar
• If you do not see an item on a toolbar and in the toolbar palette then click the "Restore Default Set" button to restore the default toolbar set up

• https://support.mozilla.org/kb/How+to+customize+the+toolbar
• https://support.mozilla.org/kb/Back+and+forward+or+other+toolbar+items+are+missing

You can check for problems with the localstore.rdf file if restore default set didn't work.

• http://kb.mozillazine.org/Corrupt_localstore.rdf

SOLVED: By Using the "Customize" button on the Toolbars Menu, I was immediately shown all the icons to add-on to my toolbar. Thank you so much. In all my searching yesterday, I missed that. Perfect solution. Happy New Year!!!

You're welcome.

Thanks ans a Happy New Year to you as well.