I'm aware there are extensions that will set custom css for HN, but I've had enough extensions turn in to malware that I'm wearing adding something just for a few-line CSS change.
http://kb.mozillazine.org/index.php?title=UserContent.css&pr...
document.body.style.filter='invert(1)'; document.body.style.backgroundColor='#000';
Thanks to csilverman for the CSS styles!
Perhaps someone can help the process along by posting a few working dark mode styles (based on the existing class layout)?