Re-write uses event listeners to dynamically add context menu item for more coverage. Tested on Windows-98 FF2 and Puppy-Linux FF3. If not proper timing for other let me know OS version, if showing extra popup, wheter contextmenu normally opens on mousedown or after click. at http://forums.mozillazine.org/viewtopic.php?t=536977
My linux the contextmenu is opened on mousedown, unlike Win 98 which opens contextmenu after click.