in action on shootmanual.co
.header-1 {
font-family: LFTEtica-Book, helvetica, arial;
font-size: 35.9999px;
font-style: normal;
font-weight: normal;
letter-spacing: normal;
line-height: 50.3999px;
text-transform: none;
color: #4F525B;
}
.header-2 {
font-family: LFTEtica-SemiBold, helvetica, arial;
font-size: 25.9996px;
font-style: normal;
font-weight: normal;
letter-spacing: normal;
line-height: 36.3994px;
text-transform: none;
color: #13BD93;
}
.content-1 {
font-family: FiraMono-Regular, monospace;
font-size: 19.8px;
font-style: normal;
font-weight: normal;
letter-spacing: normal;
line-height: 27.72px;
text-transform: none;
color: #252628;
}
.content-2 {
font-family: FiraMono-Regular, monospace;
font-size: 19.8px;
font-style: normal;
font-weight: normal;
letter-spacing: normal;
line-height: 27.72px;
text-transform: none;
color: #252628;
}
Fira Mono is available from Font Squirrel, Google Web Fonts and Typekit.
Found by @mikesten on 27 Sep 2016.