Is it possible to configure your browser to treat every site as if it used 'font-display: optional'? I'd love to be able to do that. Seems like it should be up to the user to decide, not the web developer.
Browsers typically let you define a user stylesheet somewhere in the settings. I tried it in Safari with a simple `body {@font-face {font-display: optional;}}` but I could't verify if it has any effects. I think it is difficult because @font-face will be evaluated differently than usual css, say `color: red`. Maybe someone who has a better understanding of css could try it...