Firefox - Backing up and restoring bookmarks

Source : Firefox Help

Firefox automatically creates backups of your bookmarks and saves the last five backups for safekeeping. This article describes how to manually back up your bookmarks and how to replace your bookmarks with a backup.

• If your bookmarks suddenly become unavailable in Firefox, see Lost Bookmarks for troubleshooting information.

Manual backup

1. Click Bookmarks on the menu bar and select Organize Bookmarks.... The Library window will open.
2. In the Library window, click the Import and Backup button and then select Backup.... The Bookmarks backup file name window will appear.
   
   
3. Select a location to save the backup file.
4. Close the Library window.

Restoring from backups

Caution: Restoring bookmarks from a backup will overwrite your current set of bookmarks with the ones in the backup file.

1. Click Bookmarks on the menu bar and select Organize Bookmarks.... The Library window will open.
2. In the Library window, click the Import and Backup button and then select Restore.
   
   
3. Select the backup from which you want to restore:  * The dated entries are automatic backups. OR Choose File... lets you restore from a manual backup (see above).
4. After choosing a backup, your bookmarks from that file will be restored. Close the   Library window.