Examine source code of Simple Startpage

{
  "manifest_version": 2,
  "name": "Simple Startpage",
  "version": "1.3",
  "applications": {
    "gecko": {
      "id": "vityavv@gmail.com"
    }
  },
  "description": "My very simple start page",
  "permissions": [
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html"
  }
}