diff --git a/scss/abstracts/_mixins.scss b/scss/abstracts/_mixins.scss
index e6093038f6..346ddcc1d2 100644
--- a/scss/abstracts/_mixins.scss
+++ b/scss/abstracts/_mixins.scss
@@ -247,6 +247,8 @@
 		}
 
 		@media not (-moz-platform: windows) {
+			// fx115: Necessary to hide default focus ring
+			outline: none;
 			box-shadow: 0 0 0 var(--width-focus-border) var(--color-focus-border);
 
 			@if $thin {