diff --git a/packages/ckeditor5-theme-lark/theme/ckeditor5-ui/components/icon/icon.css b/packages/ckeditor5-theme-lark/theme/ckeditor5-ui/components/icon/icon.css
index 5118999572a..7b85b8ef4a2 100644
--- a/packages/ckeditor5-theme-lark/theme/ckeditor5-ui/components/icon/icon.css
+++ b/packages/ckeditor5-theme-lark/theme/ckeditor5-ui/components/icon/icon.css
@@ -18,9 +18,6 @@
 	/* Inherit cursor style (#5). */
 	cursor: inherit;
 
-	/* This will prevent blurry icons on Firefox. See #340. */
-	will-change: transform;
-
 	& * {
 		/* Inherit cursor style (#5). */
 		cursor: inherit;