Examine source code of Forex Time

{
  "manifest_version": 3,
  "name": "Forex Time",
  "description": "View global stock exchange trading hours at a glance.",
  "version": "1.2.0",
  "icons": {
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "action": {
    "default_icon": {
      "19": "icon-19.png",
      "38": "icon-38.png"
    },
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "service_worker": "background.js"
  },
  "permissions": [
    "storage",
    "alarms",
    "notifications"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "extension@forexTime",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}