Examine source code of Video remote

{
  "manifest_version": 2,
  "name": "__MSG_appName__",
  "description": "__MSG_appDesc__",
  "default_locale": "en",
  "version": "4.0.1resigned1",
  "icons": {
    "128": "icon.png"
  },
  "applications": {
    "gecko": {
      "id": "ciem@into.hu",
      "strict_min_version": "42.0",
      "strict_max_version": "*"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/",
        "http://*/*",
        "http://*/*/",
        "https://www.youtube.com/*",
        "https://vimeo.com/*"
      ],
      "all_frames": true,
      "js": [
        "background2.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "background.js",
    "icon.png",
    "options.html"
  ],
  "permissions": [
    "storage"
  ],
  "options_ui": {
    "page": "options_new.html"
  },
  "options_page": "options.html"
}