Years of uni in front of a computer have really messed with the eyes, even tried blue-block glasses, but oddly took them of at night! Almost every websites blinding white background is a pain (for me) . This add-on is is awesome, some sites need a little tweaking, lesser ones used I guess, e.g., some some bars and captions don't like the change, but a little tweak here and there and you will have a much better experience, if that's your thing. I use Firefox and it can be a little intensive, but an occasional complaining yellow bar is hardly an inconvenience when you conciser what's going on behind the scenes.
I'm not normally a review writer, but this is deserving, top marks for Pavel Agarkov for Midnight Lizard. Well worth a small donation.