Über dieses Add-on
* with local files (resp. files on network shares)
* with files via FTP or WebDAV (http or https)
* with files in IMAP folders
Not a real synchronization tool, just exchanges the files!
For version 3.x under Thunderbird 78 please check my website for some hints!
This extensions simple exchanges the addressbookfiles! There is no synchronization of the content! The last upload overwrites all previous uploads.
Please use latest version from the homepage (http://www.ggbs.de/extensions/)
For problems with FTP please see the faq on the homepage.