Examine source code of ScreamingTabs

{
  "manifest_version": 3,
  "name": "ScreamingTabs",
  "version": "1.0",
  "description": "Plays a sound when too many tabs are open",
  "permissions": [
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon-48.png",
      "96": "icon.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b00ce55e-e55c-48b1-8bb6-26bbebcad6a9}",
      "strict_min_version": "112.0"
    }
  }
}