I want to migrate/copy my Thunderbird from Windows 7 to Ubuntu, where I already set up another Thunderbird installation with some old and also some new accounts. To save me more configuration work, is it possible to just merge/synchronize the account settings and address books, so that the one on Ubuntu contains everything?
I have read access to the drive where Windows-Thunderbird is installed. However, I can't just copy old files and replace my current ones, as there are already other, new accounts set up I also need to keep.
Note that many of the accounts are POP3, so mails are saved on the disk, not in the cloud. I should copy them over too.
So in short: How do I merge and synchronize accounts created with Thunderbird easily?