The Bookmarks toolbar by default is below the Address toolbar.
You can move it above the tabs, on the same line as the Address or other toolbar, or above or below another toolbar, but I don't think there is a way to locate it in between the tab row and the Address bar.
Go to View > Toolbars > Customize (or right-click a toolbar or blank tab area and select Customize) and drag "Bookmarks Toolbar Items" to the new location.
If you want to save real estate you can hide (uncheck) the Bookmarks toolbar and toggle it on and off as a sidebar with Ctrl + B.
Steve