firefox print/print preview button menu
Replace the default Firefox "Print" button with the Mozilla Suite style "Print/Print Preview" toolbar button/menu.
If you already have the "Print" button in your toolbar, the change will take place automatically. If not, use View > Toolbars > Customize... to add the button. It will look the same as before in the customisation dialog, but once added to the toolbar you will see the additional arrow for the dropdown menu.