[qiine]

settings, calendar, tasks, contacts, I have multiple mail accounts and a lot of info that reside only on my main PC currently, I estimated that redoing everything would take hours to me.

[abdullahkhalids]

Fair enough. I think the correct way to do it would be to integrate Firefox sync into Thunderbird.

[ies7]

Except settings, I use caldav+carddav (sogo) to sync those.

[hiepph]

If only they had configuration files...