Comment 7 for bug 1573478

Okay, I've done that. I'll log out and back in again.

Actually, I rebooted, as I saw there was a kernel update I hadn't rebooted after applying. The reboot turned into the scary kind, for this Intel NUC, where I had to unplug not only all USB3 drives, but also the HDMI display before it would display the boot screen. But I'm back in action.

I'll let you know if there are further problems.

All Firefox windows are correctly decorated now, and the untouchable FF window on the 2nd monitor is also dispalying and functioning again properly.