http://gothub.nowhevi57f4lxxd6db43miewcsgtovakbh6v5f52ci7csc2yjzy5rnid.onion/tonsky/FiraCode/wiki/How-to-enable-stylistic-sets
                                
                                
                                                                            You will need to insert a font object for Fira Code in one or more profiles: An example font object: "font" : { "face" : " Fira Code " , "features" : { "ss01" : 1 , "ss02" : 1 , "ss03" : 1 , "ss04" : 1 , "ss05" : 1 , "ss06" : 1 , "zero" : 1 , "onum" : 1 }
    } Some Apple apps Adobe apps, MS Word etc...