For those who have missed the big news, Firefox now supports conic gradients!
Starting with Firefox 75, released on the April 7, we can go to
about:config, look for the layout.css.conic-gradient.enabled flag and set its value to
false by default and all it takes to switch is double-clicking it).
With that enabled, now we can test our CSS including conic gradients in Firefox as well.… Read article “Background Patterns, Simplified by Conic Gradients”