Firefox Environment Backup Extension (or FEBE) is a Pale Moon browser extension for backing up and restoring user profiles.
[2][3] However, Firefox profiles may be backed up manually.
[4] The source files are distributed under MPL-2.0.
Among other settings, it handles bookmarks, history, extensions and passwords.
[5] The extension offers several configuration options to customize the backup tasks, and can also do scheduled backups.