Examine source code of Safe Search Engine Kids

{
  "manifest_version": 2,
  "name": "Safe Search",
  "description": "Safe Search App is a quick launcher for easy access to kid's safe search engines.",
  "version": "1.0.2",
  "icons": {
    "128": "icon_128.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  }
}