The menu toolbar, bookmarks toolbar and title bar are all hidden by default in Mozilla Firefox. You can display these bars by customizing Firefox's user interface. In Customize mode, you can also change the position of the buttons, such as Home, Downloads and Bookmark.
Open Mozilla Firefox, click the Firefox menu button — it has three horizontal lines — and click Customize to switch to Customize mode.
Click the Show/Hide Toolbars button and select Menu Bar to display the Menu bar at the top of the browser. To also display the Bookmarks toolbar, select Bookmarks from the drop-down menu.
Click the Title Bar button to display the title bar at the top of the browser. Clicking the button again hides the title bar.
Click the Exit Customize button to save the changes and switch to Normal mode. If you are not satisfied with the result, switch to Customize mode again and make any additional changes.