How to Substitute Fonts in Firefox for Windows without Extensions (Bye Arial!)
Update on July 25, 2021: Firefox 90 has re-introduced the problem. You can fix the issue by following steps mentioned in this Firefox support thread. Update on June 19, 2021: Firefox 89.0.1 has FIXED whatever issue was introduced in Firefox 89.0. Below steps are working again! Update on June 5, 2021: These steps no longer …