# Captcha Helper

> Recognize common static text and one-step arithmetic CAPTCHAs offline, then fill safely or ask for confirmation.

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

## Overview

- **ID:** `captcha-helper`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Wang Hongshuo
- **Category:** privacy-security
- **Daily users:** 1
- **Weekly downloads:** 1
- **Version:** 1.3.1
- **Last updated:** 2026-08-30
- **First published:** 2026-08-27
- **Size:** 5.43 MB
- **Data as of:** 2026-09-08
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/captcha-helper/)
- **Website:** [https://github.com/hongshuo-wang/local-captcha-solver/issues](https://github.com/hongshuo-wang/local-captcha-solver/issues)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/captcha-helper/privacy/](https://addons.mozilla.org/firefox/addon/captcha-helper/privacy/)

## Description

Captcha Helper recognizes common static text CAPTCHAs entirely on your device.

Supported CAPTCHA types:
<ul><li>Digits</li><li>Uppercase and lowercase English letters</li><li>Alphanumeric strings</li><li>One-step integer arithmetic using +, -, *, /, x, X, ×, or ÷</li></ul>
Start recognition from the extension popup, an image context menu, or the configured mouse shortcut. When the result is reliable and the page contains one matching empty input
  field, Captcha Helper can fill it automatically. Low-confidence or ambiguous results are left for you to review.

Recognition and automatic filling are separate decisions. The extension never clicks a submit button, never submits a form, and does not replace existing input without
  confirmation.

All recognition runs locally using the model bundled with the extension. CAPTCHA images and recognition results are not uploaded. There is no account, advertising, analytics,
  telemetry, remote OCR service, or runtime model download.

You control website access. Grant access to all HTTP/HTTPS websites or maintain a list of selected sites. Settings, permission state, and sanitized diagnostic records remain in
  your browser.

Captcha Helper is open-source software released under the MIT License.

## Rankings

- #112,141 — Overall
- #55 — captcha

## Permissions and access

### Permissions

- `activeTab`
- `clipboardWrite`
- `contextMenus`
- `storage`
- `scripting`

## Safety

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

### Analysis details

- Allows reading and modifying clipboard content, which can be sensitive, posing a moderate privacy risk.
- This extension was recently updated in the past month. New updates 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/captcha-helper)