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Preview of Container Rules Manager

Container Rules Manager by Sarcastic Bird

Manage Multi-Account Containers site-to-container assignments. Add, edit, and bulk-manage rules with import and export.

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About this extension
Container Rules Manager gives you a full table view of your Multi-Account Containers site assignments. Add multiple sites at once with comma-separated input, reassign sites between containers, bulk delete, and import/export rules as JSON for backup or migration.

Requires a native messaging host (Go binary) to read and write MAC's database. See the GitHub repository for installation instructions.

How it works: Multi-Account Containers locks its database while enabled. Temporarily disable MAC via about:addons, make your changes, then re-enable it. The extension detects MAC's status and guides you through this process.

https://github.com/sarcasticbird/fmac-rules-manager
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Permissions and data

Required permissions:

  • Exchange messages with programs other than Firefox
  • Download files and read and modify the browser’s download history
  • Monitor extension usage and manage themes

Data collection:

  • The developer says this extension doesn't require data collection.
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More information
Add-on Links
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Version
0.1.0
Size
16.79 KB
Last updated
4 days ago (May 6, 2026)
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License
MIT License
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