1. Alt-F (File menu) → Import and Export
2. Export to a file
3. Export Favorites
4. From your top-level favorites folder
5. Save to My Documents (the default)

1. Ctrl-Shift-B (Open Bookmarks Manager)
2. Import and Backup
3. Import Data from Another Browser

In Firefox:

Control-Shift-B → Import and Backup → Restore

Select the backup from which you want to restore.

The dated entries are automatic backups.

Choose File lets you restore from a manual backup.