How do I add the Bookmarks Menu button to the toolbar? The Bookmarks Menu button is not shown by default but you can add it by customizing your Firefox toolbar:

Click on the menu button , then click More tools and select Customize Toolbar…. A special tab will open which allows you to drag and drop items in or out of the overflow menu and the toolbar. Drag the Bookmarks Menu to the toolbar. Click Done. To remove the button, use the above steps to drag the Bookmarks Menu button out of the toolbar. If you want more information on how to manage and customize your bookmarks, go to the following link and follow the instructions detailed there. Bookmarks in Firefox

THERE IS NO MENU BUTTON ON MY HOME FIREFOX SCREEN !!