I\'m using (the excellent) Font-Awesome in my site, and it\'s working fine, if I use it this way:
B
I got a simillary problem using unicode and fontawesome. when i wrote :
font-family: 'Font Awesome\ 5 Free';
content: "\f061"; /* FontAwesome Unicode */
On google chrome, a square appear instead of the icon. The new version of Font Awesome also requires
font-weight: 900;
That's work for me.
From : https://github.com/FortAwesome/Font-Awesome/issues/11946
Hope that's will help.