He has made this decision to reduce the amount of duplicated work to make the extension available on both his site and addons.mozilla.org.
What does this mean for you?
Well, if you’re running the version from addons.mozilla.org, then you really should uninstall this and get the latest version from Mike’s site.
This is doubly important since newer versions of Firefox have been reported to crash when managed using older versions of CCK2.
As always, if you have any questions, queries or comments, let us know below and I’ll try to respond to and delve into as many as I can.