I tryed this extension in Waterfox
Online can’t install but i save the xpi in my pc and install from my pc without problem.
After installed some function do not work (notify do not show and some value will not changed).
I opened firefox again to check and with firefox quantum working great (script injection change resolution and other).
I waterfox I enabled script injection (that works in firefox quantum) but in waterfox do not work, because more value will be not updated without script injection.
Works only with firefox quantum.