У вашего броузера проблема в совместимости с HTML5
i have a dell inspiron laptop which seemed to have a keyboard problem with rainbow six. i recommend checking the battleye log after your game crashes to look for a reason, as it helped me with my problem.
if you have any questions, please leave a comment and i'll get back to you as soon as i can. i'm by no means an expert, but this video offers some insight into this issue and the many solutions possible.