How to enable the bookmarks toolbar in Firefox

In Chrome it's the bookmarks bar; in Firefox, it's the bookmarks toolbar.  If you want to enable the bookmarks toolbar in Firefox, here's how.

With the mouse:
Click View on the menu bar at the top of the browser window.  (If you don't see the menu bar, press <ALT> to make it appear.)  Hover over Toolbars, then click on Bookmarks Toolbar.

With the keyboard:
To do the same thing without the mouse, press <ALT>, then <V>, then <T>, then <B>.