Obviously we love dark themes here at Ubuntu Satanic Edition, but they do bring with them certain issues, mainly due to applications which are not based wholly on GTK widgets. This includes important apps such as Firefox and Open Office.
Changing userContent.css solves problem ; more information is here also dolerean theme comes with the firefox tweak more information is here; just installing it is enough.
Today I decided I'd look into fixing problems with dark themes and Firefox. Basically, if you're using a dark theme with Ubuntu 8.04 and Firefox 3 a lot of websites will show up with black or dark input boxes and black font inside those.
Arc Firefox theme.
6. When you set a dark theme in your system firefox changes it's look to that theme's color. How can I fix that?
Ubuntu IRC Support. AskUbuntu. Official Documentation.
There is also arc theme available for Firefox.
Unlike regular Firefox theme Arc isn’t available from the Mozilla add-ons repository. Don’t panic: themes for Arc, Arc Dark and Arc Darker are available from Github in easy-to-install .xpi format.
Arc Dark Firefox. The Arc Firefox Theme can easily be downloaded and installed on Linux Ubuntu Systems. This theme is compatible with Firefox 40+ and Firefox 38 ESR.
For users of Dark Themes Like Ambiance Blackout Colors These tweaks fix issues with the software center and Firefox with this theme and other dark themes.