Menu Editor
Firefox version 1.2.6 - Released May 02, 2008
Menu Editor Options window screenshot
Menu Editor is an extension that allows you to customize the menus in Firefox and Thunderbird.
Install version 1.2.6 for Firefox 2 and 3
Comments or Questions?
To install Menu Editor in Thunderbird, right-click the link, choose "Save Link As" and install the downloaded menuedit.xpi file using Install button in Thunderbird's Extensions window
source: http://menueditor.mozdev.org/
