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manifest.json
{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "WebApp Finder: Extension tool without extensions",
  "description": "No need to install extensions for every small task when a web app can do it too.",
  "version": "3.4.0",
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "background": {
    "service_worker": "background.js"
  },
  "action": {
    "default_title": "Default Popup Title",
    "default_popup": "popup.html"
  }
}