Cardmarket Chart Extension

Name: Cardmarket Chart Extension
Author: Matras

By: Matras

Cardmarket Chart Extension enhances Cardmarket product pages with clearer, more meaningful charts — powered by community data.

Download

Install

Features & Capabilities

This extension replaces the default Cardmarket chart with improved price and availability charts that become more accurate and more useful as the community grows.

What does it show?

📈 7-day average price (AVG7) for smoother price trends

📦 Available item count over time

⏱️ Multiple time ranges: 30 days, 1 year, max

Historical data on Cardmarket is limited. This extension improves charts by collecting anonymized, aggregated market data contributed by users.

➡️ The more users participate, the better and more complete the charts become for everyone.

Optional features (recommended)

✅ Community data sharing – helps build better historical charts

✅ Random fetch – automatically collects live market data in the background while browsing

Both features are opt-in and can be enabled or disabled at any time.

Privacy-friendly by design

-No accounts required -No tracking -No personal data collected -Only product-related numeric data (prices and availability)

User Growth & Download Statistics

Add-on

By:

Matras

Daily users:

Version:

0.3.6 Last updated: 2026-01-23

Version code:

6129692

Creation date:

2025-12-23

Risk:

Permissions:

storage
*://www.cardmarket.com/*
*://cmce-api.timaschwabe.workers.dev/*

Content scripts matches:

www.cardmarket.com

Size:

129.16KB

Email:

Ma*****@gmx.de

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-15

Compare stats and ranking:

Ranking

# 61,415 ▼ 399

Other rankings

#19 in chart keyword 22 ▼ 1

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:

Matras

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/cardmarket-chart-extension/

Email:

Ma*****@gmx.de

Permission Change History

2025-12-27: Version 0.2.0 → 0.3.3

Add Permissions: *://www.cardmarket.com/* *://cmce-api.timaschwabe.workers.dev/*

Remove Permissions: https://www.cardmarket.com/* https://cmce-api.timaschwabe.workers.dev/*

Is Cardmarket Chart Extension 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.

Cardmarket Chart Extension requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

High Injects scripts into web pages, which may alter or extract site contents, resulting in a substantial risk.
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.

Cardmarket Chart Extension is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

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