Examine source code of Kill Swine

{
  "manifest_version": 2,
  "name": "Kill Swine",
  "version": "1.2",
  "description": "Plugin que evitar suinos no forumoff",
  "icons": {
    "48": "icons/swine-48.png",
    "64": "icons/swine-64.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.forumoff.com/*"
      ],
      "js": [
        "swine.js"
      ],
      "run_at": "document_end"
    }
  ]
}