The new Firefox version 57 troubles me. My left eye starts to hurt after just 1-2 minutes looking at it, and it gets red over time. When I minimize the window - instant relief. The next day, the same problem. So in the evening I downgraded to Firefox 56, no problems anymore.
I currently use Arch Linux, Xfce desktop, and the "nouveau" kernel driver (plus Xorg driver xf86-video-nouveau), for my known-to-be-good NVIDIA Quadro NVS 295, and I force-enabled Firefox's hardware acceleration like I did on Firefox 56 (under Linux you have to force-enable it; "layers.acceleration.force-enabled").
Firefox pre-57 was usable for some months, at least since version 52. But now they changed something...
What did they change? Looks exactly like any other window, no visible flickering, no flicker when using a digital camera. And it's just in the Firefox window. Whatever is drawn that hurts is just inside the Firefox window. I'm currently writing this on the downgraded Firefox 56: no eye strain.
Any of you noticed similar problems yet? This is not good.