У вашего броузера проблема в совместимости с HTML5
Watch Dogs testing PC gameplay
(Played with xbox360 controller)
Recorded with fraps
30-40fps
without fraps
40-50+fps
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PC Specs
Gigabyte Radeon 7870oc
AMD FX 6350 3.9GHz (stock speeds)
8GB RAM
Windows 8.1 64 Bits
Game is on High+ settings
resolution 1360x768 (hdtv native resolution), no vsync, fxaa (msaa x4 also gives similar fps, probably 5fps lower), hbao+. 38fps on cars, 50+fps walking.
if lowering resolution to 1280x768 it will give a stable 50+fps all time, so probably at 720p will give stable 60fps.
Runs well, but i think a better cpu or overclocking this will help, this game is very cpu intensive.
The game runs well, also i think an AMD Catalyst patch and some game updates will help perfomance