I love Solarized color-scheme and this addon applies it perfectly, even on dark pages.
I'm missing an URL white-list, because there are some pages where I would prefer the original colors, but right now there's no option to prevent it, nor to get back the original colors once the addon changed them.

It does work, but you can't change the color however you want. The option in Firefox is not explained nor intuitive to use. I've tried finding the config.js to edit the color. It's no where on the mozilla's folders, in both users and installation. It seem the instruction was for Chrome users... not Firefox. It need more work.