Examine source code of 3D Audio Visualizer Pro

{
  "manifest_version": 3,
  "name": "3D Audio Visualizer Pro",
  "version": "0.1.0",
  "description": "Visualize audio in real-time 3D",
  "browser_specific_settings": {
    "gecko": {
      "id": "3d-audio-visualizer@deltacraft",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "action": {
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*"
      ],
      "js": [
        "content_script.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "host_permissions": [
    "*://www.youtube.com/*",
    "https://extensionpay.com/*"
  ],
  "permissions": [
    "storage",
    "tabs"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "three.min.js",
        "visualizer.js"
      ],
      "matches": [
        "*://www.youtube.com/*"
      ]
    },
    {
      "resources": [
        "ExtPay.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}