Examine source code of 3D Friend

{
  "manifest_version": 3,
  "name": "3D Friend",
  "version": "1.0.0",
  "description": "A 3D character appears on your browser page and either runs away from or chases your mouse cursor",
  "browser_specific_settings": {
    "gecko": {
      "id": "3dfriend@3dfriend.fun",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/icon16.png",
      "48": "images/icon48.png",
      "128": "images/icon128.png"
    }
  },
  "permissions": [
    "activeTab",
    "storage",
    "unlimitedStorage"
  ],
  "host_permissions": [
    "https://3dfriend.fun/*",
    "https://www.3dfriend.fun/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self'"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "three.min.js",
        "GLTFLoader.js",
        "content.js"
      ],
      "all_frames": false,
      "run_at": "document_end"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "content/models/*.glb",
        "content/textures/*",
        "content/environmentMap.jpg",
        "*.png",
        "*.jpg"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}