Examine source code of DuniaKaguya Helper

{
  "manifest_version": 2,
  "name": "DKHelper",
  "version": "1.0.3",
  "author": "DuniaKaguya.com & spenibus",
  "description": "Helper untuk membantu memutar video di duniakaguya.com",
  "icons": {
    "128": "media/icons.png"
  },
  "background": {
    "persistent": false,
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "DKHelper",
    "default_icon": {
      "64": "media/icon.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "Helper@duniakaguya"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "permissions": [
    "tabs",
    "<all_urls>",
    "webRequest",
    "webRequestBlocking",
    "cookies",
    "storage",
    "privacy",
    "http://*/*",
    "https://*.google.com/*",
    "https://*/*",
    "http://*/*/*",
    "https://*/*/*"
  ]
}