Re: IceCat from Guix all monospaced font

[ison]

I think quotes cause it to fail. I just tried quoting the font name in my
settings.ini and it switched to a fallback font. Can you try with the following:
gtk-font-name=Deja Vu Sans 10
No quotes.
It probably helps to use an application to set it too, so you know there's no
silly formatting errors.