Examine source code of AnyDownload

{
  "browser_specific_settings": {
    "gecko": {
      "id": "yt-dlp-web@devofthedark.ca",
      "strict_min_version": "154.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "manifest_version" : 3 ,
  "name" : "AnyDownload",
  "description" : "Download media from almost any site, entirely inside your browser.",
  "version" : "1.2.1",
  "action" : {
    "default_title" : "AnyDownload: click to download current page"
  },
  "permissions" : [
    "scripting" ,
    "cookies" ,
    "storage" ,
    "declarativeNetRequestWithHostAccess" 
  ],
  "host_permissions" : [
    "*://*/*" 
  ],
  "content_security_policy" : {
    "extension_pages": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self'; worker-src 'self';",
    "sandbox": "sandbox allow-scripts; script-src 'self' 'unsafe-eval' 'unsafe-inline' blob:;"
  },
  "web_accessible_resources" : [
    {
      "resources" : [
        "core/iframe/*" ,
        "core/sandbox/*" ,
        "rpc.js" 
      ],
      "matches" : [
        "<all_urls>" 
      ]
    }
  ],
  "background" : {
    "scripts" : [
      "rpc.js" ,
      "background.js" ,
      "firefox/background.js" ,
      "whatsnew/background.js" 
    ]
  },
  "icons" : {
    "16" : "logo/icon16.png",
    "32" : "logo/icon32.png",
    "48" : "logo/icon48.png",
    "128" : "logo/icon128.png"
  },
  "sandbox": {
    "pages": [
      "core/sandbox/sandbox.html"
    ]
  }
}