Stable 60 FPS on high setting here with Firefox 58, Linux, open source drivers (mesa-17.3.5) and an AMD Radeon RX 460 (passive).
So its neither a Linux nor an open source driver problem. Maybe your hardware is in fact not up to the job or you need to install some updates ;-)
Btw. I also tested chrome and as long as I run it with default settings I get around 3-5fps, but when I activate #ignore-gpu-blacklist in chrome://flags it reaches 60 fps there too.
So its neither a Linux nor an open source driver problem. Maybe your hardware is in fact not up to the job or you need to install some updates ;-)
Btw. I also tested chrome and as long as I run it with default settings I get around 3-5fps, but when I activate #ignore-gpu-blacklist in chrome://flags it reaches 60 fps there too.