Examine source code of Trooper checker

{
  "name": "Trooper checker",
  "version": "2.1resigned1",
  "description": "Toont een balkje bovenaan websites die Trooper ondersteunen, zodat je niet vergeet om naar de site te surfen via de Trooper-pagina",
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "jquery-3.2.1.min.js",
        "trooper.js"
      ],
      "css": [
        "trooper.css"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "storage"
  ],
  "browser_action": {
    "default_icon": "logo-64.png",
    "default_popup": "popup.html"
  },
  "icons": {
    "64": "logo-64.png",
    "128": "logo-128.png",
    "256": "logo-256.png",
    "512": "logo-512.png"
  },
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{3b818edd-47a6-4326-b0f5-f7002fe69536}"
    }
  }
}