Extension Wizard is very helpfulAfter a couple of days I finally could make an extension work. This was only possible
with the help of the Firefox/Thunderbird Extension Wizard.
fill the form, download the zip, it worksI filled in the required fields, and some others as well; checked a few checkboxes, i.e. "Use Unix line endings"; and finally clicked "Create Extensions". I extracted the downloaded zip file to my Development directory on my desktop and updated the development profile for firefox according to the included readme.txt. When I started firefox with the development profile, the extension was installed and I actually saw results!
coming nextThis is a huge step forward for me
I'll next play around with the current code to get a feel what does what. And eventually there will be a shiny "hello donationcoder" extension for FF3.
Hopefully
the wizard will help others too.