diff --git a/packages/base-styles/_mixins.scss b/packages/base-styles/_mixins.scss
index e800967004a5dd..79c23d4221cecd 100644
--- a/packages/base-styles/_mixins.scss
+++ b/packages/base-styles/_mixins.scss
@@ -288,7 +288,6 @@
 	}
 
 	&::-moz-placeholder {
-		opacity: 1; // Necessary because Firefox reduces this from 1.
 		color: $dark-gray-placeholder;
 	}