Examine source code of NB Detector

{
  "name": "NB Detector",
  "version": "1.0.4",
  "description": "Detect the authenticity of a website.",
  "manifest_version": 2,
  "browser_action": {
    "default_icon": "images/nb-blue-64.png",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "sw.js"
    ]
  },
  "permissions": [
    "activeTab",
    "alarms",
    "cookies",
    "tabs",
    "https://nb-detector.network-box.eu/*"
  ]
}