Examine source code of Web App Maker

{
  "manifest_version": 3,
  "name": "Web App Maker",
  "description": "Open sites in a window without any browser decorations. For when you want the Progressive Web App (PWA) or Site Specific Browser (SSB) experience.",
  "version": "2024.10.1.1",
  "permissions": [
    "clipboardWrite",
    "tabs",
    "webNavigation"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "action.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8f951055-7bfe-4b20-a9cb-7921ea76e29d}"
    }
  }
}