Addon firefox: Download Print Preview Firefox Add-on 0.7.1.4

A Firefox extension that allows you to see a print preview

Print-Preview-Firefox-Add-on creates a Print Preview context menu item
that allows you to see how a webpage would look like if printed.

With Print Preview Firefox Add-on you won't have to copy the page some
another program in order to see it printed.

http://www.softpedia.com/get/Internet/Internet-Applications-Addons/Mozilla-Extensions/Print-Preview-Firefox-Add-on.shtml