It seems that both Firefox and Thunderbird are using a different styling for their messages, since modifying the class "dim-label", as I do in Gnome boxes, doesn't affect them at all.
Moreover, since GTK Inspector doesn't seem to work fully with those two, I need to look deeper in their code
It seems that both Firefox and Thunderbird are using a different styling for their messages, since modifying the class "dim-label", as I do in Gnome boxes, doesn't affect them at all.
Moreover, since GTK Inspector doesn't seem to work fully with those two, I need to look deeper in their code