Key Master

Name: Key Master
Rating: 4 (3 reviews)
Author: Ducttape warrior

By: Ducttape warrior

Key Master is an on page key price checker for the Steam store supporting G2Play, G2A and Kinguin

Download

Install

Features & Capabilities

Key master makes it easy to check game pricing without leaving the Steam store page. It provides a link to the relevant page on the G2Play, Kinguin and G2A key market platforms to make the transition easier between these stores. Just open a game on the Steam store, and after a second you'll notice the big yellow buttons underneath the Steam "add to cart" button!

--Currently in public beta--

FAQ:

-Are these sites trustworthy?

They are nothing but a digital distribution site for keys. If you have no concerns buying keys on Amazon, they shouldn't cause any worries.

-Could you implement "x" feature?

Send in your feature and I'll take a look at its feasability.

The prce shown on my steam store page is extremely high. How come?

This means that the price was correctly scraped for your own currency but the currency sign is wrong. My apologies. I did not foresee this. I will tackle this bug ASAP

User Growth & Download Statistics

Add-on

By:

Daily users:

Rating:

Version:

1.1.1resigned1 Last updated: 2024-04-25

Version code:

5726660

Creation date:

2016-03-02

Risk:

Permissions:

tabs
https://*/*
http://*/*
https://g2api.downstairs.be/*

Content scripts matches:

store.steampowered.com

Size:

1.03MB

URLs:

Website ,Privacy policy

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-19

Compare stats and ranking:

Ranking

# 28,169 ▼ 937

For Developers

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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:

Ducttape warrior

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/key-master/

Website:

https://downstairs.be

User Reviews

by 敬念*****, 2025-04-15

by 天灭*****, 2025-03-09

Doesn't work

by Fi*****, 2019-05-25

View all user reviews ›

Is Key Master 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.

Key Master requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
Critical ****** ****** ** *** ********* ****** * *********** ******** **** ** ** *** ******* *** ****** **** **** *** ******* *****
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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.

Key Master has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

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