# GitHub + Mermaid

> A browser extension for Chrome, Opera & Firefox that adds Mermaid language support to GitHub.

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

## Overview

- **ID:** `github-mermaid`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Alex Mercier
- **Category:** web-development
- **Daily users:** 276
- **Weekly downloads:** 7
- **Rating:** 5.00 / 5 (5 ratings)
- **Version:** 0.1.1
- **Last updated:** 2019-04-26
- **First published:** 2019-04-25
- **Size:** 1.67 MB
- **Data as of:** 2026-09-08
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/github-mermaid/)

## Description

GitHub + Mermaid is a browser extension for Chrome, Opera & Firefox that enables Mermaid language support on GitHub. With this extension, you can easily create diagrams using code blocks in GitHub issues, Pull Requests, or .md files. For more information about Mermaid language syntax, visit the official Mermaid website.

## Rankings

- #6,968 — Overall
- #14 — github
- #71 — term
- #134 — gif
- #216 — graph
- #245 — pull

## Permissions and access

### Permissions

- `https://github.com/*`
- `https://*.github.com/*`

### Content script matches

- `github.com`
- `*.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/github-mermaid)