Examine source code of News Hound

{
  "name": "News Hound",
  "version": "0.9.8",
  "description": "Up-to-date news aggregated from thousands of blogs, newspapers, and magazines around the Web.",
  "browser_action": {
    "default_icon": {
      "128": "/pub/icons/icon-128.png"
    },
    "default_title": "News Hound",
    "default_popup": "/index.html"
  },
  "default_locale": "en",
  "icons": {
    "128": "/pub/icons/icon-128.png"
  },
  "manifest_version": 2,
  "permissions": [
    "geolocation",
    "https://news.google.com/",
    "https://openweathermap.org/"
  ]
}