# A test extension

> This is a Manifest Version 3 test extension that is only useful to Firefox developers.

Canonical page: [https://chrome-stats.com/d/a-test-extension](https://chrome-stats.com/d/a-test-extension)

## Overview

- **ID:** `a-test-extension`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** William Durand 🌟
- **Category:** other
- **Version:** 3.0.0
- **Last updated:** 2024-05-16
- **First published:** 2022-11-21
- **Size:** 8.32 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/a-test-extension/)

## Description

A test extension is a Manifest Version 3 test extension that is only useful to Firefox developers. This extension serves as a tool for testing and experimentation within the Firefox browser. It provides developers with a platform to explore and evaluate the features, capabilities, and compatibility of the latest Manifest Version 3 specifications. With this extension, developers can seamlessly test and fine-tune their own Firefox add-ons, ensuring optimal performance and compatibility with future browser updates.

## Rankings

- #139,882 — Overall

## Permissions and access

### Permissions

- `activeTab`

## 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/a-test-extension)