I use this on Firefox to get the white out. It works great and when it doesn't it's very easy to disable.The colors are completely customizable. https://addons.mozilla.org/en-US/firefox/addon/dark-background-light-text/
The dark background gives me fainting spells. The light background is better. It is pleasant for the eyes. elderly folks like light background because of eye degeneration problems. interestingly we have such a diverse preference.