Examine source code of Billiard1

{
  "manifest_version": 2,
  "short_name": "Billiard",
  "version": "1.5.1resigned1",
  "icons": {
    "128": "img/icon.png"
  },
  "name": "Billiard",
  "description": "Cool billiard,very intresting game",
  "browser_action": {
    "default_icon": "img/icon.png",
    "default_popup": "index.html",
    "default_title": "Billiard"
  },
  "content_security_policy": "script-src 'self' ; object-src 'self'",
  "permissions": [
    "tabs",
    "storage",
    "webNavigation",
    "http://*/*",
    "https://*/*",
    "webRequest",
    "webRequestBlocking",
    "management",
    "cookies"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f327dd2d-a444-4cf5-a92f-a2fbbc6f5cb3}"
    }
  }
}