MozBackup is a simple utility for creating backups of
Mozilla Firefox,
Mozilla Thunderbird,
SeaMonkey, Mozilla Suite and
Netscape profiles.
It allows you to backup and restore
bookmarks, mail, contacts, history, extensions, cache etc. It's an easy way to do Firefox backup, Thunderbird backup ....
1.
Download free Mozbackup and install it.
2. Run MozBackup. It shows up the wizard for backing up / restoring Mozilla user profiles. Click "Next".

3. Select "Backup a file". Select the application you want to backup.

4. Select profile you want to save. Click "Browse" to set the path for output backup file. Click "Next".

5. Select the details you want to backup. Click "Next".

6. Done.