<link href="https://fonts.googleapis.com/css2?family=Fira+Code&display=swap" rel="stylesheet">.https://fonts.googleapis.com/css2?family=Fira+Code&display=swap in this case).
Download each font referenced in the CSS file you just downloaded.src: url(https://fonts.gstatic.com/s/firacode/v26/uU9eCBsR6Z2vfE9aq3bL0fxyUs4tcw4W_D1sJVD7Ng.woff2) format('woff2'); into src: url(uU9eCBsR6Z2vfE9aq3bL0fxyUs4tcw4W_D1sJVD7Ng.woff2) format('woff2');)
<link href="/Assets/Fonts/Fira/Code/2025-8-13/fira-code.css" rel="preload"/>
<link href="/Assets/Fonts/Fira/Code/2025-8-13/fira-code.css" rel="stylesheet"/>
code {
font-family: "Fira Code", monospace;
font-optical-sizing: auto;
font-weight: 400;
font-style: normal;
}