Examine source code of Weather Reminder

{
  "manifest_version": 2,
  "name": "Weather Reminder",
  "version": "1.0",
  "description": "Get weather reminders for your travel destination.",
  "permissions": [
    "storage",
    "activeTab",
    "https://api.open-meteo.com/*"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7d50ffdb-b750-4e4c-a72a-e1806dfd5070}"
    }
  }
}