What is Container Windows?

Container Windows focuses on keeping Firefox container tabs organized across separate windows. It is catalogued under Browser DevTools & extensions on PulseGate.

Who should use Container Windows?

Container Windows is a consumer product built for firefox users who manage multiple container tabs.

Does Container Windows have a free plan?

Yes — Container Windows is free to use.

What platforms does Container Windows run on?

Container Windows runs on the web and embeddable surfaces.

Is Container Windows still maintained?

Unverified. Container Windows has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What projects are similar to Container Windows?

Similar projects tracked by PulseGate include Containerized, Windowed Container Workspaces, and Container Workspaces.

Who makes Container Windows?

Container Windows is developed by JM.

How long has Container Windows been around?

Container Windows first shipped in 2023.

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Container Windows

Name: Container Windows
Author: JM

mozilla.orgBrowser DevTools & extensions

Container Windows is a Firefox extension that assigns new container tabs to windows containing matching container tabs. It also provides simplified window management and a dark mode, without collecting developer-declared user data.

FreeWebEmbeddable

Visit mozilla.org

Overview

5 features

Container Windows sits in PulseGate's Browser DevTools & extensions category. It focuses on keeping Firefox container tabs organized across separate windows. It is built as a consumer product for firefox users who manage multiple container tabs. Container Windows costs nothing to use. Container Windows is available on the web and embeddable surfaces.

JM builds and maintains Container Windows, and it first shipped in 2023. Key capabilities include container tab grouping, window assignment, and window management. The interface is available in 32 languages, including Czech, German, and Greek.

Summary written by a language model from the project’s public pages.

Container tab grouping
Window assignment
Window management
Dark mode
Closed-tab access

Built with & integrations

Runs on

BrowserEmbeddable

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed18 Sep · 12:46 UTC
Container Windows verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Container Windows

What is Container Windows?: Container Windows focuses on keeping Firefox container tabs organized across separate windows. It is catalogued under Browser DevTools & extensions on PulseGate.
Who should use Container Windows?: Container Windows is a consumer product built for firefox users who manage multiple container tabs.
Does Container Windows have a free plan?: Yes — Container Windows is free to use.
What platforms does Container Windows run on?: Container Windows runs on the web and embeddable surfaces.
Is Container Windows still maintained?: Unverified. Container Windows has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What projects are similar to Container Windows?: Similar projects tracked by PulseGate include Containerized, Windowed Container Workspaces, and Container Workspaces.Containerized Windowed Container Workspaces Container Workspaces
Who makes Container Windows?: Container Windows is developed by JM.
How long has Container Windows been around?: Container Windows first shipped in 2023.

At a glance

Pricing: Free
Platforms: Web
Built for: Firefox users who manage multiple container tabs
Model: B2C
Solves: Keeping Firefox container tabs organized across separate windows.

Registered as

Firefox Add-ons: container-windows

Developer

Index record

Indexed: 18 Sep 2026
Lifecycle: Alive
Last seen: 18 Sep 2026

Identity audit (13)

Slug: container-windows-mozilla-org
Lifecycle state recorded: 18 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 18 Sep 2026
Timeline basis: Indexed-at chronology. This listing's first-seen date was written by the catalog backfill, not observed here, so it is not treated as a sighting.
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 18 Sep 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/container-windows

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