I would like very much to change the fonts that Firefox uses from Sans-Serif 
to a Serif font.  All of the fixes for this issue that I've found on the web 
advocate using GTK-QT-engine and GTK Styles and Fonts to fix this, but it's 
not working for me.  After verifying that GTK-QT-engine 
(trinity-gtk-qt-engine) is installed, I shut down all instances of Firefox, 
then used the Trinity Control Center to set "Use my TDE style in GTK2 
applications", "Use my TDE style in GTK3 applications", and "Use my TDE fonts 
in GTK2 applications"; but after restarting Firefox, the same old Sans-Serif 
fonts are displayed in all Firefox menus, dialogs, etc.
	I also tried "Use another (GTK2) font, specifying "Droid Serif (size 9)", but 
that didn't work either.
	There is no GTK3 Fonts section in GTK Styles and Fonts, so I can't explicitly 
tell TDE to change the GTK3 fonts.
	Is there another way to tell Firefox (and other GTK apps) to use a different 
font without installing all of Gnome?

Leslie