У вашего броузера проблема в совместимости с HTML5
Memestriker has provided us with a launch option that potentially fixes FPS issues for the update which added a userdata folder and video settings etc. This might work for you.
Put this in the end of launch options: +mat_queue_mode 2
Reddit Thread: https://www.reddit.com/r/GlobalOffensive/comments/4331xq/for_everyone_that_got_fps_problems/?ref=share&ref_source=link
List of CPU's that are proven to help:
Q9300
i3-2105
i7-2600K
i5-3570K
i5-4460K
i5-4590
i5-4670K
i5-4690K
i7-4700HQ
i7-4710HQ
i7-4790
i7-4790K
i5-6500
AMD FX-6300
AMD FX-8350
List of CPU's that don't help:
i7-4770k
Boost Thumbnail Picture: http://www.softaculous.com/website/images/ampps/boost.png
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