Examine source code of Quick Access Thinkcare

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Quick Access Thinkcare",
  "description": "Shortcuts",
  "version": "1.0.0",
  "icons": {
    "128": "Images/herdez 150x150.png"
  },
  "browser_action": {
    "default_icon": "Images/herdez 19x19.png",
    "default_popup": "popup.html"
  }
}