i'm posting this here so good information remains relevant

#troubleshooting PSA for people using a #firefox based web browser on #KDE #plasma with a #wayland compositor:

if you're getting some strange flickering in your display every now and then, it might not be your desktop environment natively, but rather your web browser. i had been struggling with this for weeks until i found a post in a support forum from back when wayland was first seeing widespread adoption. messing with HDR and scaling settings didn't seem to affect the issue, but this config change did

in your about:config for your browser, you need to switch widget.wayland.opaque-region.enabled to false

for me, it was that simple. i have been using this laptop for hours since the fix, and in a timeframe in which i previously would have seen dozens of little flickers on my screen, i have yet to observe one. i hope this information helps somebody