Examine source code of Media Controller

{
  "manifest_version": 3,
  "name": "Media Controller Pro",
  "version": "2.6.0",
  "description": "Adaptive media controller with realtime updates and customizable controls.",
  "icons": {
    "256": "sound-recognition.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": "sound-recognition.png"
  },
  "permissions": [
    "tabs",
    "scripting"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "js": [
        "content.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "attach.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a5405ad8-3fa6-4e1f-84de-4dac3d37ac70}",
      "strict_min_version": "148.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}