# Test Cards

> Copy and prefill test card numbers and other payment methods with a single click.

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

## Overview

- **ID:** `test-cards`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Edward Ji
- **Category:** web-development
- **Daily users:** 5
- **Weekly downloads:** 1
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 1.1.3
- **Last updated:** 2026-06-29
- **First published:** 2026-02-23
- **Size:** 259 KB
- **Data as of:** 2026-09-09
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/test-cards/)
- **Website:** [https://github.com/edward-ji/test-cards-extension](https://github.com/edward-ji/test-cards-extension)

## Description

Streamline your payment integration testing with instant access to test card numbers for major gateways. This extension provides a convenient side panel to browse, select, and manage the test credentials you need for any payment flow without ever leaving your active tab.

## Rankings

- #44,005 — Overall
- #34 — payments
- #62 — card
- #73 — gateway
- #191 — testing

## Permissions and access

### Permissions

- `scripting`
- `activeTab`
- `storage`
- `webNavigation`
- `https://*/*`
- `http://*/*`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> 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/test-cards)