Examine source code of GitHub Stars Dashboard

{
  "manifest_version": 2,
  "name": "GitHub Stars Dashboard",
  "version": "1.4",
  "description": "Adds your GitHub stars to the dashboard.",
  "applications": {
    "gecko": {
      "id": "{980a619e-d0e1-435e-ab6d-70e42d1a80f2}"
    }
  },
  "icons": {
    "48": "icons/icon-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://github.com/",
        "*://github.com/dashboard/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ]
}