У вашего броузера проблема в совместимости с HTML5
Testing my new fixed config for Quake Live. Greatly improved visibility, matched the crosshair label type and crosshair label size for more accurate shooting. cg_picmip variable has involved. Turned off automatic weapon switch on pickup for Duel game type.
Link for config download: http://vk.com/doc-32187051_286422186?dl=44a3c64037323b7882
Link to my Quake Live profile: http://www.quakelive.com/r/profile/summary/tab_kz