У вашего броузера проблема в совместимости с HTML5
This is a quick guide covering the process of starting an Arma 3 server.
For the things I cover in this guide to function you must have your router port-forwarded to support an Arma 3 server. You can find my guide covering that below.
Port Forwarding: https://www.youtube.com/watch?v=jzP1FGu82nw&t
My Facebook: https://www.facebook.com/arma.guides.3