Examine source code of Facebook Friends Remove

{
  "background": {
    "persistent": false,
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.facebook.com/*"
      ],
      "js": [
        "index.js"
      ],
      "css": [
        "style.css"
      ]
    }
  ],
  "icons": {
    "16": "img/logo-x16.svg",
    "48": "img/logox48.svg",
    "128": "img/logo-x128.svg"
  },
  "description": "it's hard to remove all your friends one by one, But with our Extention you can remove All Of Your Friends At once && for free!",
  "manifest_version": 2,
  "name": "Facebook Friends Remove",
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "web_accessible_resources": [
    "img/load.gif",
    "img/check.gif",
    "img/icon-x48.png",
    "img/logox48.svg"
  ],
  "author": "Cody4code (Fekerine-Amar)",
  "version": "1.0.0",
  "browser_action": {},
  "browser_specific_settings": {
    "gecko": {
      "id": "{da49fb96-cfdf-4fb7-9c72-605bfcb16177}"
    }
  }
}