Can you add a HOTKEY toggle for on/off?

Good.

It does seem to always block the background image unlike the top rated "special algorithm" night mode addon (leaving a bit around the edges which is OK, I guess).

Darkening the main image somewhat until mouse-over is a good idea.

Some night mode addons use a black mask that kills the "previous" and "next" buttons on some web-comic websites rendering them useless. The very dark brown that this addon uses leaves those buttons juuust visible, so this is better than those. It *would* be nice if this addon had a control to raise the light level of that brown a bit because it is *very* dark.