Examine source code of Embedy HD

{
  "author": "embedy",
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "browser_action": {
    "default_icon": "images/on.png",
    "default_popup": "popup.html",
    "default_title": "Embedy HD"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "js": [
        "scripts/content.js"
      ],
      "matches": [
        "*://*.embedy.cc/embed/*",
        "*://*.embedy.ru/embed/*",
        "*://*.embedy.org/embed/*",
        "*://*.embedy.eu/embed/*",
        "*://*.myvideo.cc/embed/*",
        "*://*.gettube.co/video/*"
      ],
      "run_at": "document_start"
    }
  ],
  "description": "Расширение позволяет просмотр видео в разрешении 1080p без каких-либо ограничений.",
  "homepage_url": "https://embedy.cc/",
  "icons": {
    "128": "images/icon128.png"
  },
  "manifest_version": 2,
  "name": "Embedy HD",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "cookies",
    "storage",
    "*://embedy.cc/*",
    "*://embedy.ru/*",
    "*://embedy.org/*",
    "*://embedy.eu/*",
    "*://myvideo.cc/*",
    "*://gettube.co/*",
    "*://vk.com/*",
    "*://*.vk.com/*",
    "*://*.vkuservideo.net/*",
    "*://*.vk-cdn.net/*",
    "*://*.vkuserlive.com/*",
    "*://*.mycdn.me/*",
    "*://*.vkuser.net/*"
  ],
  "version": "1.6.7",
  "browser_specific_settings": {
    "gecko": {
      "id": "{a3e26320-095f-44c6-b064-f035b40dda28}"
    }
  }
}