For my company I have to produce a new version of a thunderbird plugin, and when I submit it to sign it I have the folowing error : "Duplicate add-on ID found"
I don’t want to publish it addons.mozilla.org, just to sign it and to provide it by an external web site
The former developper says he has never plublish the plugin.
This user submitted the add-on a while ago, but never completed the submission. It looks like you can contact them via the contact form on their website, so I suggest you give that a try.
Hi, I am having the same problem, and the XPI I want to sign has never been registered at AMO site. Is it possible that I send you the ID I am using and check its availability?