Typewriter

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "Typewriter",
  "description": "Plays typewriter sounds when you type on any web site.",
  "version": "2.2",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "TypeWriter.js"
      ]
    }
  ],
  "background": {
    "service_worker": "service_worker.js"
  },
  "action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_title": "Typewriter sounds"
  },
  "permissions": [
    "storage",
    "offscreen"
  ],
  "icons": {
    "48": "icon48.png",
    "128": "icon128.png"
  }
}