Examine source code of Hestia

{
  "applications": {
    "gecko": {
      "id": "hestia@gonguet.com",
      "strict_min_version": "57.0"
    }
  },
  "author": "Terry Gonguet",
  "manifest_version": 2,
  "name": "Hestia",
  "version": "1.3.3",
  "description": "A customizable new tab extension.",
  "icons": {
    "32": "resources/icon-32.png",
    "64": "resources/icon-64.png",
    "128": "resources/icon-128.png"
  },
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "background": {
    "page": "background.html"
  },
  "permissions": [
    "storage"
  ]
}