One of the annoying aspects of Firefox and Thunderbird is that your favorite
add-ons may no longer work after a new version of the program has been
released. You know that sooner or latter the add-on author will update the
product but that doesn't help when you need to use the add-on immediately.
There are several different ways to solve this but this method documented by
Senior Editor Alan Marillier has the advantage of universal applicability and
providing an understanding how the add-on system actually works.
http://www.techsupportalert.com/content/how-update-firefox-thunderbird-addons-new-release.htm
