Examine source code of ArceusBeGone

{
  "manifest_version": 2,
  "name": "ArceusBeGone",
  "version": "1.0",
  "description": "This extentions brings justice to the good name of Arkoose.",
  "icons": {
    "48": "icons/arkoose.png",
    "128": "icons/arkoose.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{2fecbd1f-6a05-4cf8-822e-9cf4646b51e4}"
    }
  }
}