I have a dark theme enabled on xfce, and this is not a problem for me in chromium. The inputs in native apps are dark, but they are the default light color in web pages on chromium.
Web developers are just not terribly competent. It should be obvious that setting text color but not text background is erroneous. Since expecting basic competence from web developers seems to be a losing battle several things suggest themselves.
- provide a gui option to select the theme/style to use for firefox separate from the gui. This is already possible at the command line.
- Explicitly check for text that is to close to the background wherein only one attribute is set and adjust the smartest solution
- Just ignore the users colors like chrome does.
Personally I have a dark gtk theme but run firefox with a light one because otherwise the web is unusable.
or whatever your desired theme is
in fact I have the following fish shell function
function withtheme
env GTK_THEME=$argv[1] $argv[2..-1]
end
You can copy the firefox desktop file from /usr/share/applications to ~/.local/share/applications and edit the exec line as you please.