Examine source code of Weather Forecast

{
  "name": "Weather Forecast",
  "description": "Weather Forecast",
  "version": "1.0.1.1",
  "manifest_version": 3,
  "permissions": [
    "tabs",
    "geolocation"
  ],
  "action": {
    "default_icon": {
      "16": "images/assets/16.png",
      "24": "images/assets/24.png",
      "32": "images/assets/32.png",
      "128": "images/assets/128.png"
    },
    "default_title": "Weather Forecast",
    "default_popup": "popup.html"
  },
  "icons": {
    "48": "images/assets/32.png",
    "96": "images/assets/128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "WeatherForecast01@shakil102043",
      "strict_min_version": "42.0"
    }
  }
}