Examine source code of PNCDF3

{
  "manifest_version": 2,
  "author": "Jaca Paladium",
  "name": "PNCDF3",
  "version": "3.1resigned1",
  "description": "This extension set the comments of Gizmodo Brazil to the top because people usually prefer to see the comments first anyway,right ?",
  "icons": {
    "48": "cryingfox.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.gizmodo.uol.com.br/*"
      ],
      "js": [
        "script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{daed6e4e-6141-426c-85ea-349d07ee75fd}"
    }
  }
}