The best free alternative to Siphon is Firefox Sync, which is also Open Source. If that doesn't suit you, our users have ranked three alternatives to Siphon and three of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to Siphon are MozBackup and Hekasoft Backup & Restore.
Lets you sync your data and preferences (such as your bookmarks, history, passwords, open tabs and installed add-ons) across all your devices. It's free to use.
MozBackup is a simple utility for creating backups of Mozilla Firefox, Mozilla Thunderbird, Mozilla Sunbird, Flock, SeaMonkey, Mozilla Suite, Spicebird, Songbird and Netscape profiles.
Hekasoft Backup & Restore is an all-in-one solution to manage your browser data and settings. Backup your favorite browser’s settings in a single file that you can store on external drive or CD-ROM and use it to restore the profile.
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