You should be able to do this quite easily :)

For help on re-arranging the Firefox Toolbars, see Customize Firefox Controls, Buttons, and Toolbars

Thanks for your response. I'm sorry to be so dense... but all I see in the referenced "how to" section is how to add function icons to the navigation bar. I don't see how to move an existing toolbar onto the same line as the existing Firefox Bookmarks toolbar. Can you please elaborate?

Thank you.

You probably can't do this with the Norton Toolbar.
This is only possible if that toolbar content allows to be positioned on other toolbars and not all toolbars support this.