GM Print Preview is a Greasemonkey (Firefox add-on) user script, which searches a page for print stylesheets and if they are present the user can quickly and easily switch the page styles into these designed for print.

The script scans a page and if the page contains a stylesheet for a printer (print media) the script displays (in the top-left corner) a semi-transparent bar with a link to the print preview of the page. If you click on the link the page stylesheets are switched and you can see the page as it would print on a printer. There is also a keyboard shortcut - ctrl+alt+p. It is possible to switch off the print preview bar (the keyboard shortcut remains functional).

Why would you install the script?

Because this is the easiest way how to get a print preview. There are other ways, but they are not as quick and straightforward as using Greasemonkey Print Preview.

How to install

1. Install Greasemonkey add-on into your Firefox (you'll be asked to restart your Firefox afterwards).
2. Go to the Greasemonkey Print Preview page and click on the button "Install this script" OR use the local link to download here.