Relax Sounds : sounds for focus and relax

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Relax Sounds : sounds for focus and relax",
  "permissions": [
    "storage"
  ],
  "description": "Relax Sounds : sounds for focus and relax",
  "default_locale": "en",
  "background": {
    "service_worker": "js/background.js"
  },
  "version": "1.1",
  "manifest_version": 3,
  "action": {
    "default_popup": "html/popup.html",
    "default_icon": {
      "16": "images/icon16.png",
      "32": "images/icon32.png",
      "48": "images/icon48.png",
      "128": "images/icon128.png"
    }
  },
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "options_page": "html/backgroundMusic.html"
}