Mozilla addon page: https://addons.mozilla.org/en-US/firefox/addon/print-preview-button-and-ke/
Firefox and Thunderbird extension that adds a "Print Preview" button to the main toolbar.
Binds the Ctrl+Alt-Shift+P keyboard shortcut to Print Preview.
Icons derived from the Fugue icon set, by Yusuke Kamiyamane - CC-BY 3.0 - https://github.com/yusukekamiyamane/fugue-icons