Inverted display mode for bright monitors at night
Nightlight inverts the colors on webpages for better ergonomics working in dark or dimly lit rooms. The result is that instead of the typical dark text on a light background you get light text on a dark background. Images are not inverted so graphics still render nicely on most pages. Background images ARE inverted.
It is simple to toggle on or off with a click of a button.
Works well for most pages but it is only a first pass attempt at solving the problem -- feedback is welcome!