fa-fast-backward icon in font awesome icons has 1 variant fas i.e.,solid.
fa-fast-forward icon in font awesome icons has 1 variant fas i.e.,solid.
fa-feather-alt icon in font awesome icons has 1 variant fas i.e.,solid.
fa-female icon in font awesome icons has 1 variant fas i.e.,solid.
fa-fighter-jet icon in font awesome icons has 1 variant fas i.e.,solid.
fa-file-alt icon in font awesome icons has 2 variants regular (far) and solid (fas)
fa-file-archive icon in font awesome icons has 2 variants regular (far) and solid (fas)
fa-file-download icon in font awesome icons has 1 variant fas i.e.,solid.
fa-file-medical-alt icon in font awesome icons has 1 variant fas i.e.,solid.
fa-file-upload icon in font awesome icons has 1 variant fas i.e.,solid.