The 50 States Free

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "The 50 States Free",
  "description": "The 50 States Free teaches you where every state is located in the United States.",
  "version": "2.1",
  "manifest_version": 2,
  "offline_enabled": true,
  "icons": {
    "16": "images/icon-16.png",
    "128": "images/icon-128.png"
  },
  "app": {
    "background": {
      "scripts": [
        "js/background.js"
      ]
    }
  },
  "sandbox": {
    "pages": [
      "index.html"
    ]
  },
  "permissions": [
    "identity",
    "https://dolphinitprod.azure-mobile.net/"
  ],
  "oauth2": {
    "client_id": "232095463259-640m2eu6evrkl4406v90tvehbp3vfr34.apps.googleusercontent.com",
    "scopes": []
  }
}