I've successfully integrated org-capture with thunderbird
It is very trivial, but since I saw earlier posts on this: check https://bitbucket.org/phromo/org-thunderbird/src/b6ac29949911/thund.js
It has a few limitations
- works by org-mode shell links (see note in paste)
- can't find the email if it gets moved to another folder.
Please post any improvements or suggestions to me or on bitbucket
Regards,
Martin