http://gothub.pjsfkvpxlinjamtawaksbnnaqs2fc2mtvmozrzckxh7f3kis6yea25ad.onion/tonsky/FiraCode/wiki/How-to-enable-stylistic-sets
VS Code Since version 1.40 , you can define in settings.json : " editor.fontLigatures " : " ' ss01 ' , ' ss02 ' , ' ss03 ' , ' ss04 ' , ' ss05 ' , ' ss06 ' , ' zero ' , ' onum ' " To avoid possible bugs, you must uninstall Fira Code 1.x before installing Fira Code 2+. CSS . monaco-editor { font-feature-settings : " ss01 " , " ss02 " , " ss03 " , " ss04 " , " ss05 " , " ss06 " , " zero " , " onum " ;
} RStudio Create or edit an rstheme file and add: . ace_editor {...