Testcase Reducer

Name: Testcase Reducer
Rating: 5 (2 reviews)
Author: Thomas Wisniewski

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

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Inspect the element you would like to reduce a test-case for/from in the devtools.
Configure the parameters in the testcase reducer devtools panel for the addon;
- Including ancestor nodes may be necessary to capture the HTML/CSS causing the issue.
- Including CSS fonts may be necessary if webfonts are part of the problem.
- Including @media rules can catch responsive breakpoints that may cause the issue.
- Including important meta-tags can help for mobile layout (meta viewport) or charset/Content-Type issues.
- Including @page rules can catch print-stylesheet-specific issues.
- Including scripts may be helpful if the issue is script-triggered.
Click "reduce" to see the resulting markup and a preview.
- Showing the preview iframe with the original viewport size can help reveal responsive breakpoint issues.
Copy and paste the markup to your own local file, or click to upload to Codepen, JSBin, or JSFiddle.

Add-on

By:

Daily users:

Rating:

Version:

1.5.0 Last updated: 2024-03-03

Version code:

5700135

Creation date:

2019-02-21

Risk:

Permissions:

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

Size:

91.24KB

Email:

te*****@webcompat.com

URLs:

Website

Full description:

Source:

Firefox Browser Add-ons

Data ingested on:

2025-07-08

Ranking

# 15,990 ▼ 486

Other rankings

#4 in reduce keyword 10 #62 in purpose keyword 1 ▼ 1 #219 in cause keyword 23 ▼ 3

User reviews

by 远离*****, 2025-04-20

by 敬念*****, 2025-03-14

essential when you need to isolate a markup to create a test case.

by kd*****, 2020-06-29

View all user reviews ›

Extension safety

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Testcase Reducer requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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Medium ****** ** ********* ****** ********* *** **** ****** **** **** ** ******* ** ********** **** ***********
Low ******* ****** ** *** ********* ******** ********************

Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Browser Add-ons, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Testcase Reducer is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

High This extension support email may not be valid
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Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
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