Firefox fonts problem

I am using KDE desktop… Firefox fonts are looking bad… please help me to change them:(

Hi,

Go Edition->Preferences, contents tab and there you can select the font you want.

You could also install kcm_gtk and use .gtkrc-2.0-kde4 file to change gtk appearance, this works for me.
Here’s mine .gtkrc-2.0-kde4 :

# This file was written by KDE
# You can edit it in the KDE control center, under "GTK Styles and Fonts"

include "/usr/share/themes/Industrial/gtk-2.0/gtkrc"
include "/etc/gtk-2.0/gtkrc"

style "user-font"
{
	font_name="DroidSans"
}
widget_class "*" style "user-font"

gtk-theme-name="Industrial"
gtk-font-name="DroidSans"
gtk-icon-theme-name="OxygenRefit2-black-version"