# Container Rules Manager

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

Canonical page: [https://chrome-stats.com/d/container-rules-manager](https://chrome-stats.com/d/container-rules-manager)

## Overview

- **ID:** `container-rules-manager`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Sarcastic Bird
- **Category:** tabs
- **Weekly downloads:** 1
- **Version:** 0.1.0
- **Last updated:** 2026-05-09
- **First published:** 2026-05-06
- **Size:** 17 KB
- **Data as of:** 2026-09-11
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/container-rules-manager/)
- **Website:** [https://github.com/sarcasticbird/fmac-rules-manager/issues](https://github.com/sarcasticbird/fmac-rules-manager/issues)

## Description

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.

<a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/8e495792415751b3016cfe3a0b3e59e605257eacb0ff847d12a860480c9bf061/https%3A//github.com/sarcasticbird/fmac-rules-manager" rel="nofollow">https://github.com/sarcasticbird/fmac-rules-manager</a>

## Rankings

- #146,855 — Overall
- #241 — rule

## Permissions and access

### Permissions

- `nativeMessaging`
- `management`
- `downloads`
- `storage`

## Safety

- **Risk impact:** Low risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Facilitates communication between extensions and native applications, usually low risk if managed correctly.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/container-rules-manager)