Examine source code of Prezenz Web Guard

{
  "manifest_version": 3,
  "name": "Prezenz Web Guard",
  "version": "0.1.76",
  "description": "Blockiert Ablenkungen während Prezenz-Sessions.",
  "browser_specific_settings": {
    "gecko": {
      "id": "prezenz-web-guard@prezenz.ch",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "declarativeNetRequest",
    "webNavigation",
    "nativeMessaging",
    "alarms",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "web_accessible_resources": [
    {
      "resources": [
        "blocked.html"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "incognito": "spanning"
}