This question already has an answer here:
I like dark themes a lot, but I cannot use them with satisfaction: it often happens that I need to fill in a form on a web page (gmail login, for instance, or even here in stackexchange: the question tags), and I cannot read what I'm writing.
I think this is due to the fact the toolkit will render the text with light colors, while the website CSS are usually written under the assumption that the text will be rendered with dark colors. Example:
You don't see the "hello there" in the username box...
I think this is a general problem, so I'm wondering if there's some graphical theme for the browser (in my case Firefox, but any answer is probably useful) which would allow me to fix this problem.
Thanks for your help :)
This answer I chose was good for my case, but still probably you want to add more resources. Also see the related question: How can I over-ride website themes to surf with a 'dark' theme