# Joshi Koukousei Captcha Service

> Tired of solving captchas all day? Don't want carpal tunnel syndrome young? Have dyslexia? Then Joshi Koukousei's Captcha Service is here for you! Using a small machine learning model, JKCS saves you time by solving 4chan captchas for you!

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

## Overview

- **ID:** `jkcs`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** araragi-coomtech
- **Category:** privacy-security,social-communication
- **Daily users:** 435
- **Weekly downloads:** 1
- **Rating:** 3.59 / 5 (41 ratings)
- **Version:** 0.61
- **Last updated:** 2023-09-06
- **First published:** 2022-08-04
- **Size:** 2.40 MB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/jkcs/)
- **Website:** [https://git.coom.tech/araragi/JKCS](https://git.coom.tech/araragi/JKCS)

## Description

Joshi Koukousei Captcha Service is a Chrome extension designed to save you time and effort by automatically solving 4chan captchas. Ideal for users who dislike repetitive captcha entry, suffer from dyslexia, or want to avoid wrist strain like carpal tunnel syndrome. This extension employs a small machine learning model to efficiently handle captchas on your behalf.

Keep updated with the latest versions via the official repository to ensure continued support and performance. Experience a hassle-free browsing experience while navigating 4chan and similar sites with ease.

## Rankings

- #5,428 — Overall
- #4 — tunneling
- #7 — service
- #9 — captcha
- #120 — house
- #143 — mouse

## Permissions and access

### Permissions

- `https://*.4chan.org/*`
- `https://*.4channel.org/*`
- `https://sys.4chan.org/*`

### Content script matches

- `*.4chan.org`
- `*.4channel.org`
- `sys.4chan.org`

## Safety

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

### Analysis details

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

## Review summary

The 'Joshi Koukousei Captcha Service' Firefox add-on is praised for effectively autofilling captchas and being a useful tool when operational. However, it often becomes broken or unreliable following captcha system updates, leading to broken autofill functions and user frustration. Despite these intermittent issues, updates have periodically restored its functionality. Overall, users find it innovative and valuable but are critical of its inconsistent performance and the need for more timely fixes.

### Pros

- When functioning, the add-on works perfectly and autofills captchas effectively.
- It is considered a lifesaver by some users for bypassing captchas.
- The add-on has been updated and restored to working condition multiple times.
- Users appreciate the innovative nature of the tool for handling captchas.
- Provides good support for specific captcha types like sliders.

### Cons

- The add-on frequently breaks and stops working due to updates or changes in captchas.
- Autofill feature often fails while some captcha elements like sliders may still work.
- Users report prolonged periods of malfunction before fixes are released.
- The add-on is dependent on timely updates which seem to lag behind captcha changes.
- Multiple users have expressed frustration over its unreliability at times.

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