Best Extension to Invert Bright Colors on Webpages

A plain color inversion turns faces blue and skies orange, so a good inverter has to treat pictures differently from the page.

Modern Dark Mode does this. It inverts the page's colors with a CSS filter and rotates the hues back, so white backgrounds turn dark and colors keep roughly their original hue instead of turning into their opposites. Then it flips images, videos, canvases, SVGs and embedded frames back again, so photos look close to normal. The catch is images a site sets as backgrounds in its stylesheet: those can still come out inverted. If a site looks wrong, tick "Exclude this site" in the popup.