core/homeassistant/components/fully_kiosk/icons.json

{
  "services": {
    "load_url": {
      "service": "mdi:link"
    },
    "set_config": {
      "service": "mdi:cog"
    },
    "start_application": {
      "service": "mdi:rocket-launch"
    }
  }
}