Who is Container Opener for?

Container Opener is a consumer product built for firefox users managing multiple accounts or browsing contexts.

Is Container Opener free?

Yes — Container Opener is free to use.

What platforms does Container Opener run on?

Container Opener runs on the web and embeddable surfaces.

Is Container Opener still maintained?

Unverified. Container Opener 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 Opener?

Similar projects tracked by PulseGate include Containerise, Containerized, and Container Manager.

Who makes Container Opener?

Container Opener is developed by doorpop.

How long has Container Opener been around?

Container Opener first shipped in 2019.

Back to the index

Container Opener

Name: Container Opener
Author: doorpop

mozilla.orgBrowser DevTools & extensions

Container Opener is a Firefox extension that opens a website in multiple Firefox containers at the same time. It is useful for users who manage separate accounts with the same provider, such as multiple email accounts.

FreeWebEmbeddable

Visit mozilla.org

Overview

4 features

Container Opener sits in PulseGate's Browser DevTools & extensions category. It focuses on opening the same website across multiple Firefox containers to manage separate accounts simultaneously. It is built as a consumer product for firefox users managing multiple accounts or browsing contexts. It is available for free. It ships for the web and embeddable surfaces.

Behind Container Opener is doorpop, and it first shipped in 2019. Key capabilities include multi-container opening, website launching, and firefox tab access. The interface is available in 32 languages, including Czech, German, and Greek.

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

Multi-container opening
Website launching
Firefox tab access
Multiple account support

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

Indexed10 Sept · 11:09 UTC
Container Opener verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Container Opener

What is Container Opener?: Container Opener focuses on opening the same website across multiple Firefox containers to manage separate accounts simultaneously. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is Container Opener for?: Container Opener is a consumer product built for firefox users managing multiple accounts or browsing contexts.
Is Container Opener free?: Yes — Container Opener is free to use.
What platforms does Container Opener run on?: Container Opener runs on the web and embeddable surfaces.
Is Container Opener still maintained?: Unverified. Container Opener 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 Opener?: Similar projects tracked by PulseGate include Containerise, Containerized, and Container Manager.Containerise Containerized Container Manager
Who makes Container Opener?: Container Opener is developed by doorpop.
How long has Container Opener been around?: Container Opener first shipped in 2019.

At a glance

Pricing: Free
Platforms: Web
First seen: 10 Sept 2026
Built for: Firefox users managing multiple accounts or browsing contexts
Model: B2C
Solves: Opening the same website across multiple Firefox containers to manage separate accounts simultaneously.

Registered as

Firefox Add-ons: container-opener

Developer

doorpop

Index record

Indexed: 10 Sept 2026
Lifecycle: Alive
First seen: Sept 2026
Last seen: 10 Sept 2026

Identity audit (13)

Slug: container-opener-mozilla-org
Lifecycle state recorded: 10 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 10 Sept 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
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: 10 Sept 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/container-opener

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