You can invert colors in MuPDF, and someone added a way to save your settings (incl. width and height, position of window, inverted color, zoom) and whatnot upon quitting. This person added a search history too (per PDF). I forgot who though, which might make my comment not-so-helpful.
If interested, I am willing to look for it, might be someone I follow.
If interested, I am willing to look for it, might be someone I follow.