I have very low vision so I have the screen colors in Firefox set to black background with white letters. When printing anything from anywhere in Firefox, web site screen or this screen, I will get a black piece of paper. It prints the black screen background but prints black letters on it which is unreadable. It also wastes lots of ink. I cannot use anything with a white (or light colored) background, I am so dazzled bu the screen that I can't see anything. It would be useful if the printing output colors could be set to ignore any special colors set on the screen. I have the same problem with Thunderbird. I can't print my emails.