On 12/24/14 10:03, poma wrote:

What theme it is?
$ xfconf-query -c xsettings -p /Net/ThemeName

[bobg@box10 ~]$ xfconf-query -c xsettings -p /Net/ThemeName
HighContrast


$HOME/.mozilla/firefox/<PROFILE>/chrome/userContent.css
/*
 * * Use this css file to eliminate problems in Firefox
 * * when using dark themes that create dark on dark
 * * input boxes, selection menus and buttons. Put this
 * * in the ../firefox/default/chrome folder or your
 * * individual user firefox profile chrome folder.

................. snip ....

I can't locate "/chrome/userContent.css"

I do find a number of directories/files like:
/home/bobg/.mozilla/firefox/2kkjzlsa.default/extensions/artur.dubovoy@gmail.com/chrome/content/

Perhaps I need to add it somewhere in that area, if so where?

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box10  Fedora-21/64bit Linux/XFCE