Backup Thunderbird Backup Inefficiencies Thunderbird stores all your e-mails in its profile directory. Each folder in Thunderbird is stored as a single file on disk. So all the e-mails in your Thunderbird Inbox are stored in a
Applications Firefox & Thunderbird Profiles On my Linux box I use Thunderbird for handling all my email and Firefox is my default browser. Even if I don't eventually remain using them I would like to copy their respective