esp8266-react-framework/interface/public/app/manifest.json

{
  "name":"ESP8266 React",
  "icons":[
    {
      "src":"/app/icon.png",
      "sizes":"48x48 72x72 96x96 128x128 256x256"
    }
  ],
  "start_url":"/",
  "display":"fullscreen",
  "orientation":"any"
}