Print Preview Button is a free Firefox extension designed to streamline the printing process by allowing users to view a page before printing it. This tool is part of the Toolbar Buttons project and utilizes the MozButton SDK for functionality. By providing a preview, it helps users save resources by ensuring that only the necessary pages are printed, thus contributing to cost and environmental savings.

The extension integrates seamlessly into the Firefox browser, making it easily accessible from the toolbar. Users can quickly open the Print Preview to inspect the layout and content of their document, ensuring that it meets their expectations before committing to print. This practical tool is essential for anyone who frequently prints documents and wants to minimize waste.