Ponder

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Ponder",
  "version": "1.0.1",
  "description": "Replace new tab page with something to ponder",
  "icons": {
    "16": "img/icon-16.png",
    "48": "img/icon-48.png",
    "128": "img/icon-128.png",
    "1024": "img/icon-1024.png"
  },
  "content_security_policy": "script-src 'self' https://ssl.google-analytics.com https://query.yahooapis.com 'unsafe-eval'; object-src 'self'",
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "offline_enabled": true,
  "permissions": [
    "geolocation",
    "unlimitedStorage",
    "https://ssl.google-analytics.com/ga.js",
    "*://*.googleapis.com/*"
  ]
}