Examine source code of QuickTimer

{
  "manifest_version": 2,
  "name": "QuickTimer",
  "version": "1.0.0",
  "description": "Create and manage custom countdown timers in a dynamic orb-weave layout.",
  "permissions": [
    "storage",
    "clipboardWrite",
    "notifications"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "QuickTimer"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7c949e50-9666-48ac-b9cf-e8aea92af1fe}"
    }
  }
}