# Accessibility Checker for GitHub Markdown

> Highlight accessibility issues as you write Markdown on GitHub.com.

Canonical page: [https://chrome-stats.com/d/a11y-checker-github-md](https://chrome-stats.com/d/a11y-checker-github-md)

## Overview

- **ID:** `a11y-checker-github-md`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** IanSan5653
- **Category:** web-development,social-communication
- **Daily users:** 1
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 1.16.3
- **Last updated:** 2025-04-23
- **First published:** 2023-05-03
- **Size:** 415 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/a11y-checker-github-md/)
- **Website:** [https://github.com/iansan5653/github-markdown-a11y-extension/discussions](https://github.com/iansan5653/github-markdown-a11y-extension/discussions)

## Description

Accessibility Checker for GitHub Markdown is a Firefox add-on that automatically highlights accessibility issues, such as missing alt text and incorrect link syntax, as you write Markdown on GitHub.com.

## Rankings

- #80,063 — Overall
- #130 — visibility
- #185 — free access

## Permissions and access

### Content script matches

- `*.github.com`

## Safety

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

### Analysis details

- Request access to the following domains: github.com
- 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/a11y-checker-github-md)