# MarketButler

> Enhance Cardmarket.com buyer's experience: Aggregate seller offers across all your Cardmarket wantslists in one view, highlight duplicates in cart, highlight vendors you already have items from in cart, display "remove all from vendor" button in cart

Canonical page: [https://chrome-stats.com/d/b2bfae8d2fb043f097c3](https://chrome-stats.com/d/b2bfae8d2fb043f097c3)

## Overview

- **ID:** `b2bfae8d2fb043f097c3`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Removed
- **Publisher:** ButlerStack
- **Category:** shopping
- **Daily users:** 2
- **Version:** 0.1.21
- **Last updated:** 2026-09-15
- **First published:** 2026-08-01
- **Size:** 96 KB
- **Data as of:** 2026-09-17
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/b2bfae8d2fb043f097c3/)
- **Website:** [https://www.labelbutler.com/en/marketbutler/](https://www.labelbutler.com/en/marketbutler/)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/b2bfae8d2fb043f097c3/privacy/](https://addons.mozilla.org/firefox/addon/b2bfae8d2fb043f097c3/privacy/)

## Description

<strong>See every Cardmarket seller's matches for all your wantlists — in one click.</strong>

MarketButler is a privacy-first companion for Cardmarket. Instead of opening each of your
wantlists one by one to check what a seller has, click one button on a seller's page and
MarketButler fetches and merges all your wantlist-filtered matches into a single table,
with a new "Wantlist" column showing which list each card came from.

<strong>Features</strong>

• One-click aggregation — a "Find all wantlist matches" button above a seller's offer table
  merges matches from every wantlist into one sorted view.
• Wantlist column — every matched card shows which list it came from.
• Full pagination — every page of a seller's offers is aggregated, not just page one.
• Cart-aware highlighting — sellers already in your cart are highlighted on product pages.
• Duplicate detection — a "highlight duplicates" toggle on the cart page badges cards you're
  buying from multiple sellers.
• Mobile remove-all — restores the "remove all items from this seller" button on small screens.
• Wantlist control — enable or disable individual wantlists from the popup.

<strong>Privacy</strong>

MarketButler runs only on <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/5bce6faa18d84cd7826e4b87fb58b0f837e0577ba44c1c82760713faddc83956/http%3A//www.cardmarket.com" rel="nofollow">www.cardmarket.com</a>. Everything it reads is processed locally in
your browser and stored only in local extension storage. It makes no network requests except
to Cardmarket itself, and it sends no data to the developer or any third party. There is no
telemetry, no analytics, and no account of its own.

<strong>Supported</strong>

Chrome (MV3, desktop), Microsoft Edge (MV3, desktop), and Firefox 140+ (desktop and android mobile).

## Permissions and access

### Permissions

- `storage`
- `unlimitedStorage`

### Host permissions

- `*://www.cardmarket.com/*`

### Content script matches

- `www.cardmarket.com`

## Safety

- **Risk impact:** Low risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Injects scripts into web pages, which may alter or extract site contents, resulting in a substantial risk.
- This extension is not longer available in the store

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/b2bfae8d2fb043f097c3)