# Testcase Reducer

> Helps with reducing markup and CSS for the purposes of generating test cases.

Canonical page: [https://chrome-stats.com/d/testcase-reducer](https://chrome-stats.com/d/testcase-reducer)

## Overview

- **ID:** `testcase-reducer`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Thomas Wisniewski
- **Category:** web-development
- **Daily users:** 44
- **Weekly downloads:** 2
- **Rating:** 5.00 / 5 (2 ratings)
- **Version:** 1.5.0
- **Last updated:** 2024-03-03
- **First published:** 2019-02-21
- **Size:** 91 KB
- **Data as of:** 2026-09-15
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/testcase-reducer/)
- **Website:** [https://github.com/webcompat/testcase-reducer](https://github.com/webcompat/testcase-reducer)

## Description

Testcase Reducer is a Firefox add-on that allows you to easily reduce markup and CSS of web elements in order to generate simplified test cases. It provides a devtools panel to configure parameters and offers a preview of the resulting markup. The reduced test cases can be copied to local files or uploaded to Codepen, JSBin, or JSFiddle.

## Rankings

- #17,166 — Overall
- #3 — reduce
- #61 — purpose
- #238 — cause

## Permissions and access

### Permissions

- `<all_urls>`
- `webNavigation`
- `https://codepen.io/*`
- `https://jsbin.com/*`
- `https://jsfiddle.net/*`

## Safety

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

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension support email may not be valid

> 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/testcase-reducer)