On Fri, 4 Nov 2016 21:02:32 -0500
Leslie Turriff <jlturriff@...> wrote:

> 	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?
> 

First, i suggest uninstalling all gtk-qt stuff, it usually cause more
problems than its solves.

Second, do you want to change Firefox font specifically, or all gtk apps?
Because the easiest ways to deal with firefox is chrome/userChrome.css file
in you firefox profile or "Theme Font & Size Changer" addon.

For all gtk apps you will have to manually create and edit config
files.
Here is the good guide to it https://wiki.archlinux.org/index.php/GTK%2B





-- 
  Nick Koretsky (nick.koretsky@...)