У вашего броузера проблема в совместимости с HTML5
New calibration process for 230s fixes drifting issue. Must have latest AR636 update
After the calibration you need to do a trim flight
https://www.youtube.com/watch?v=xG5yfkNElew
How to update AR636 firmware
https://www.youtube.com/watch?v=tTElbMSoPes