Who should use Extension?

Extension is a consumer product built for firefox users and browser extension testers.

Yes — Extension is free to use.

What platforms does Extension run on?

Extension runs on the web and embeddable surfaces.

Is Extension still maintained?

Unverified. Extension 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 are alternatives to Extension?

Similar projects tracked by PulseGate include Extensity, Notification test, and Timer Extension.

Extension is developed by GOEX.

How long has Extension been around?

Extension first shipped in 2018.

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Extension

Name: Extension
Author: GOEX

mozilla.orgBrowser DevTools & extensions

Extension is a Firefox browser add-on published on Mozilla Add-ons. It can display notifications and access data across websites, and appears intended for testing browser extension behavior.

FreeWebEmbeddable

Visit mozilla.org

Overview

5 features

Extension sits in PulseGate's Browser DevTools & extensions category. It focuses on adding browser functionality for displaying notifications and accessing website data. It is built as a consumer product for firefox users and browser extension testers. It is available for free. It ships for the web and embeddable surfaces.

Behind Extension is GOEX, and it first shipped in 2018. Among its 5 catalogued features are notifications, website data access, and firefox integration. The interface is available in 32 languages, including Czech, German, and Greek.

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

Notifications
Website data access
Firefox integration
Permission management
Version history

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

Indexed13 Sep · 03:47 UTC
Extension verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Extension

What is Extension?: Extension focuses on adding browser functionality for displaying notifications and accessing website data. It is catalogued under Browser DevTools & extensions on PulseGate.
Who should use Extension?: Extension is a consumer product built for firefox users and browser extension testers.
Is Extension free?: Yes — Extension is free to use.
What platforms does Extension run on?: Extension runs on the web and embeddable surfaces.
Is Extension still maintained?: Unverified. Extension 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 are alternatives to Extension?: Similar projects tracked by PulseGate include Extensity, Notification test, and Timer Extension.Extensity Notification test Timer Extension
Who makes Extension?: Extension is developed by GOEX.
How long has Extension been around?: Extension first shipped in 2018.

At a glance

Pricing: Free
Platforms: Web
First seen: 13 Sep 2026
Built for: Firefox users and browser extension testers
Model: B2C
Solves: Adding browser functionality for displaying notifications and accessing website data.

Registered as

Firefox Add-ons: extensiontest888

Developer

GOEX

Index record

Indexed: 13 Sep 2026
Lifecycle: Alive
First seen: Sep 2026
Last seen: 13 Sep 2026

Identity audit (13)

Slug: extension-mozilla-org-uht0pa
Lifecycle state recorded: 13 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 13 Sep 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: 13 Sep 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/extensiontest888

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