Examine source code of Familytron

{
  "manifest_version": 2,
  "name": "Familytron",
  "description": "Family members of popular celebrity: mother, father, siblings, wife, girlfriend, kids",
  "version": "1.1resigned1",
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "applications": {
    "gecko": {
      "id": "info@familytron.com",
      "strict_min_version": "57.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "http://familytron.com/*"
      ],
      "js": [
        "jquery.min.js",
        "popup.js"
      ]
    }
  ],
  "permissions": [
    "webRequest",
    "storage",
    "tabs",
    "activeTab"
  ]
}