# Container Windows

> Create a single tab group for each window using container tabs.

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

## Overview

- **ID:** `container-windows`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** JM
- **Category:** privacy-security,tabs
- **Daily users:** 9
- **Weekly downloads:** 1
- **Rating:** 5.00 / 5 (2 ratings)
- **Version:** 1.3
- **Last updated:** 2026-07-05
- **First published:** 2023-08-22
- **Size:** 16 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/container-windows/)

## Description

When creating a new container tab, it is assigned to the window with the most container tabs of the same type. If there is no container tab of the same type, a new window will open.

Windows with coexisting container tabs of different types are excluded from the assignment of new container tabs.

There is no session management. Use "Tab Session Manager" or similar.

Manifest version 3
Firefox 148+

Features
-Simplified window manager (focus, close)
-Dark mode

## Rankings

- #34,334 — Overall
- #84 — contain
- #125 — ctrl+m (windows)
- #141 — windows
- #211 — contact

## Permissions and access

### Permissions

- `contextualIdentities`
- `sessions`
- `storage`

## Safety

- **Risk impact:** Very low risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- 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-windows)