I confirm that also happens in firefox 57 on Ubuntu 17.10.
Firefox: 57.0 Ubuntu: 17.10 Gnome-shell 3.26.2 xwayland:2:1.19.5-0ubuntu2
PS I noticed there is a '-v' option for wayland that runs with "screen-saver without video blanking". Is that helpful?
I confirm that also happens in firefox 57 on Ubuntu 17.10.
Firefox: 57.0 2:1.19. 5-0ubuntu2
Ubuntu: 17.10
Gnome-shell 3.26.2
xwayland:
PS I noticed there is a '-v' option for wayland that runs with "screen-saver without video blanking". Is that helpful?