Depending on the web browser you use, there are slightly different ways to enable the Bookmarks Toolbar (known as the "Bookmarks Bar" in Chrome and Safari, or the "Favorites Bar" in Internet Explorer).
If you're using Firefox on Windows or Linux:
Right-clickHold down the Ctrl key while you click
on an empty section of the Tab Strip and select Bookmarks Toolbar in the pop-up menu.
If you're using Firefox on a Mac:
On the menu bar, click View, select Toolbars, and then select Bookmarks Toolbar.
Drag the X-Ray Goggles button into your Bookmarks Toolbar