FF vs Chrome WebGL performance

Hi all, I noticed that webGL performance on FireFox is much worse than on Chrome (9 fps vs 60 fps), though on linux, FF and Chrome perform roughly the same on the same machine.

here's a test application: http://www.shiva-engine.com/webdemo/AudiR8HD/

Is there a way to find out why? Is this a known problem on freeBSD-FF?

machine: freeBSD 11.1, c2d, gt 610, nvidia driver (from website)
 
It's nice for me: FreeBSD 11.1 with NVIDIA Driver Version 384.98, NVIDIA GT610, Intel G2010.
 
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