ValueChecker

Name: ValueChecker
Author: akabi

By: akabi

Perceptually accurate value checker for artists, emulating Photoshop’s dot gain 20% profile.

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Features & Capabilities

ValueChecker is designed for artists to check and analyze value structure of images, videos, and GIFs by emulating the working gray (dot gain 20%) profile found in Photoshop or Gray Gamma 1.8 in other software.

Standard grayscale filters/modes ignore how the human eye perceives brightness, leading to inaccurate results where bright colors can appear much darker than they should. This tool utilizes Rec. 709 luminance formula within a linear RGB color space to ensure the values remain perceptually accurate.

Press Ctrl+Y to toggle the add-on or customize it to your own liking.

User Growth & Download Statistics

Add-on

By:

akabi

Daily users:

Version:

1.0 Last updated: 2026-04-22

Version code:

6227149

Creation date:

2026-04-19

Risk:

Permissions:

Content scripts matches:

<all_urls>

Size:

213.72KB

Email:

ak*****@gmail.com

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-19

Compare stats and ranking:

Ranking

# 147,726 ▲ 2,806

Other rankings

#55 in value keyword 19 ▲ 2

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

akabi

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/valuechecker/

Email:

ak*****@gmail.com

Website:

https://github.com/akabisan/valuechecker

Is ValueChecker Safe?

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.

ValueChecker 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.
High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****

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 Add-ons Store, 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.

ValueChecker is recently added, and hasn't been around long enough for us to gather enough data to accurately assess its risk level.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
Medium **** ********* *** ******* ** *** **** * ******* *** ******* *** *** ** ****** ** *****
Medium **** ********* *** ***** ** *** **** * ******* *** ********** *** *** ** ****** ** *****