Examine source code of YYYY-MM-DD Github

{
  "manifest_version": 2,
  "name": "YYYY-MM-DD Github",
  "version": "1.0",
  "description": "Makes github display absolute times.",
  "icons": {
    "48": "48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.github.com/*"
      ],
      "js": [
        "github.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{51ead48b-c98c-4b77-88f4-bc7b1450fecf}"
    }
  }
}