Customizing toolbars and buttons
To customize a toolbar, go to the "View" menu and select "Toolbars -> Customize"; alternatively, you can context-click (right-click) on the toolbar and select "Customize". The Customize Toolbar dialog will then pop up. To remove a button or other item, simply drag it from the toolbar down into the Customize Toolbar dialog. To add a button, drag it up from the Customize Toolbar dialog and place it on the toolbar. If you want, you can even move buttons or the "Bookmarks Toolbar Items" up on the menu bar.
Warning: Do not remove "Bookmarks Toolbar Items" from the toolbars. Just hide the Bookmarks Toolbar if you don't need it.
Adding buttons provided by extensions
Some Firefox extensions provide extra toolbar buttons as part of their functionality. Installing an extension, however, does not automatically put its button on the toolbar. To add these buttons, do as described above for adding buttons to the toolbar.
Adding or removing toolbars
To show or hide the "Navigation toolbar" or "Bookmarks Toolbar" included with Firefox (both are shown by default) or to show or hide other toolbars added to Firefox, go to the "View" menu, select "Toolbars" and click on a listed toolbar to select or deselect the toolbar. If you want to uninstall a toolbar added to Firefox by an extension or other application,