Cardmarket Helper Firefox

Cardmarket Helper

Modifies the DOM on cardmarket.com to improve the UX through quality of life additions. It can also take your ManaBox collection's csv to further offer more functionality.

Features & Capabilities

Detailed Feature description Changelog 📷 Replace camera icons with real card thumbnails (adjustable thumbnail size coming soon) 🧾 Upload your ManaBox CSV once and use it across Cardmarket pages 🗂️ On Singles pages, see all printings you own plus details for the exact printing (language, condition, foil, quantity, binder) 🔗 Jump directly to the exact printing you own with prefilled filters (language, condition, foil, quantity) ⚡ Fill sell form fields in one click (quantity, language, condition, foil, altered) 💲 Auto-calculate and autofill a competitive sell price (with on/off toggle) 📊 See format legality and MTGTop8 play-rate data inline on Offers/Singles pages 🚫 Hide offers that don’t match your legality/play-rate filters 🔥 Compare offer prices against Cardmarket Low / Avg / Trend at a glance (green/orange/red deal signal) 🧩 Price comparison also works for non-singles and accessories ↔️ Export Wants List as .csv or .txt or copy it to clipboard ↙️ Import ManaBox lists into Cardmarket Wants List through Add Decklist) 📦 Export order articles as CSV (including adjusted export), including fallback export on Sales/Paid pages 📍 Show collection location info in Magic order pages 🧭 Open shipments directly in ManaBox Viewer with preloaded card data ✅ Mark sales orders as packed and see packed state in Sales/Paid list ⌨️ Use arrow keys for pagination without interfering with text inputs 🔔 Get an in-page notification when a new add-on version is installed

I am not affiliated, associated, authorized, endorsed by, or in any way officially connected with cardmarket.com, or any of its subsidiaries or affiliates.

User Growth & Download Statistics

Manifest V3 Add-on
By:
NudelForce
Daily users:
239 5
Rating:
5.00
(1)
Version:
2026.5.2.0 Last updated: 2026-05-19
Version code:
6268398
Creation date:
2024-03-26
Risk:
Moderate risk impact Moderate risk likelihood
Permissions:
Host permissions:
  • https://api.scryfall.com/*
  • https://downloads.s3.cardmarket.com/*
  • https://raw.githubusercontent.com/*
Content scripts matches:
  • www.cardmarket.com
Size:
2.47MB
URLs:
Website
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-06-14
Compare stats and ranking:

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:
NudelForce
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/cardmarket-helper/
Website:
https://github.com/SuppenNudel/cardmarket-helper

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

Risk likelihood analysis details
  • High This extension was recently updated in the past month. New updates may not be stable or safe.
  • High **** ********* *** *** **** ****** ********* ********** *** *** ** ****** ** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
  • Good **** ********* *** **** **** *******
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