У вашего броузера проблема в совместимости с HTML5
Mod available here:
https://www.digitalcombatsimulator.com/en/files/3119428/
This mod was created by me with the help of Markindel
New scripts have been for missiles to match real life data. Everything works perfectly fine including the CIWS, AEGIS, RGM-84(with 180 degree fire arcs) RGM-109C Tomahawk missile(900nm land attack range) and Mk-45 cannon(Fired at closer range only).
Game: Digital Combat Simulator by Eagle Dynamics