GitHub + Mermaid oleh Alex Mercier

A browser extension for Chrome, Opera & Firefox that adds Mermaid language support to GitHub.
Create diagrams using code blocks on GitHub issues, Pull Requests, or .md files:

```mermaid
graph TD;
A-->B;
A-->C;
B-->D;
C-->D;
```

Visit https://mermaidjs.github.io/ for more information about Mermaid language syntax.