seems to invert all colors well
I would have liked to configure which colors get inverted, for example, I don't want to invert black.

I would really like it if there was a way to implement specific themes(via stylish, etc.) per site to get around some sites not working. Also perhaps the ability to just use brightness instead of inverting and changing the page further for a more perfect experience. Other that this extension is the right step towards a f.lux for the web