Examine source code of Github-Warn

{
  "manifest_version": 2,
  "name": "Github-Warn",
  "version": "1.0.1",
  "developer": {
    "name": "Arash Thr",
    "url": "https://twitter.com/arashThr"
  },
  "description": "Removes Github warning banner for Iranian users.",
  "icons": {
    "48": "icons/git-warn-48.png",
    "96": "icons/git-warn-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.github.com/*"
      ],
      "css": [
        "github-warn.css"
      ],
      "run_at": "document_start"
    }
  ]
}