~/.config/fontconfig/fonts.conf

fonts.conf.xml

<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
	<!-- Don't use embedded bitmap in Cambria and other fonts: https://bugzilla.mozilla.org/show_bug.cgi?id=722356#c6 -->
	<match target="font">
		<edit name="embeddedbitmap" mode="assign">
			<bool>false</bool>
		</edit>
	</match>
	<alias>
		<family>monospace</family>
		<prefer><family>PragmataPro Mono</family></prefer>
		<default><family>PragmataPro Mono</family></default>
	</alias>
	<alias>
		<family>serif</family>
		<prefer><family>Liberation Serif</family></prefer>
		<default><family>Liberation Serif</family></default>
	</alias>
	<alias>
		<family>sans-serif</family>
		<prefer>
			<family>Roboto</family>
			<family>Noto Sans CJK JP</family>
		</prefer>
		<default><family>Roboto</family></default>
	</alias>
</fontconfig>