Examine source code of Max Tool

{
  "manifest_version": 3,
  "name": "Max Tool",
  "version": "1.4",
  "permissions": [
    "activeTab",
    "scripting",
    "storage",
    "webRequest",
    "declarativeNetRequest"
  ],
  "host_permissions": [
    "https://web.max.ru/*",
    "wss://web.max.ru/*"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "Max Tool"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "maxtool@komet-app.ru",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "qrcode.min.js",
        "injected.js"
      ],
      "matches": [
        "https://web.max.ru/*"
      ]
    }
  ],
  "content_scripts": [
    {
      "matches": [
        "https://web.max.ru/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start",
      "all_frames": false
    }
  ]
}