У вашего броузера проблема в совместимости с HTML5
A side by side comparison between Asus Strix GeForce GTX 970 at Stock clock vs. Overclocked, in Grand Theft Auto V Benchmark. A average of 6-12FPS higher when overclocked. Running with +130MHz on GPU and 7500MHz on VRAM, and noticed boost up to 1446MHz on the GPU.
Settings can be seen in the last part of the video (3:06). In my opinion the optimal settings for GTA5 running 1080p with a 144Hz monitor, giving both high visual fidelity and framerates between 70-100FPS, for a smooth gameplay.
Test bench setup:
Intel i5 4690K @ 4.5GHz
Corsair H100i Liquid cooling
ASUS Maximus VII Ranger
Kingston HyperX Beast 4x4GB (16GB) 2.4GHz
ASUS Strix GeForec GTX 970 4GB
Samsung 850 Evo 250GB SSD
OCZ Agility 3 120GB SSD
Western Digital Green 2TB HDD
Corsair CS550M
ASUS VG248QE 24" 144Hz Monitor