How do I display the full title bar in Firefox 29?
Solution 1:
Go to the menu, and Customise.
At the bottom-left of the customisation menu is a toggle button labelled Title Bar. This is the button you want. (It reverts to old-style top-of-window layout.)
This answer shows pictures of each menu.
Solution 2:
On the Firefox menu, click View > Toolbars > Customize; the Customize Firefox page appears. At the bottom left corner of the Customize Firefox page click the Title Bar button. Clicking this button toggles the display of the Firefox title on the top-left corner of the browser window.