MozBackupSharp

A C# WinForms application for backing up and restoring Firefox, Thunderbird, and other Mozilla-based browser profiles on Windows.

An AI-generated port of the original MozBackup tool — fully rewritten in C# using AI, not manually translated line by line.

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Screenshots

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Features

• Backup & Restore your browser profiles to a .pcv or .zip file
• Two password protection modes — Classic ZIP (ZipCrypto, compatible with original MozBackup) or AES (MozBackupSharp's own secure container)
• Supports many browsers — Firefox, Thunderbird, SeaMonkey, Waterfox, LibreWolf, Floorp, Pale Moon, and more
• Choose what to back up — bookmarks, passwords, cookies, extensions, mail folders, and more
• Portable browser support — manually select a profile folder for Tor Browser, Mullvad Browser, etc.
• Extensible — add custom browser profile paths via ProfileLocations.ini

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Requirements

• Windows
• .NET Framework 4.5
• Visual Studio 2015 (to build from source)

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Getting Started

1. Close your browser before running a backup or restore.
2. Open the app and select your browser and profile.
3. Choose Backup or Restore and follow the prompts.
4. Pick the data you want to include (bookmarks, passwords, extensions, etc.).
5. Optionally set a password to encrypt the backup file.

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Building from Source

1. Clone this repository.
2. Open MozBackupSharp.sln in Visual Studio 2015.
3. Build using Debug|Any CPU or Release|Any CPU.

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Backup File Format

• No password: the .pcv file is a standard ZIP archive (openable in 7-Zip or Windows Explorer).
• Classic ZIP (ZipCrypto): password-protected using the same format as the original MozBackup — compatible with other ZIP tools and the original app.
• AES (MozBackupSharp): a more secure encrypted container. Only MozBackupSharp can restore these files.

Tip: Use Classic ZIP mode if you need compatibility with the original MozBackup or standard ZIP tools. Use AES mode for stronger encryption.

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Supported Browsers

Family	Browsers
Firefox	Firefox, Waterfox, LibreWolf, Floorp, Zen Browser, Pale Moon, Basilisk, GNU IceCat, and more
Thunderbird	Thunderbird, Betterbird
SeaMonkey	SeaMonkey
Portable	Tor Browser, Mullvad Browser (via manual profile folder selection)

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License

Licensed under MPL 2.0, consistent with the upstream MozBackup project. Please retain all original license notices when distributing.