ISTWCMS-5711: firefox specificity added

src/patterns/04-components/menu/menu--horizontal/_menu--horizontal.scss

@@ -588,10 +588,14 @@ $menu-horizontal-drop-bg: #f7f7f7;
           /* for Chrome and Edge Brave Opera */
           break-inside: avoid;
           /* for Firefox */
-          display: inline-grid !important;
           page-break-inside: avoid;
         }
       }
     }
   }
 }
+@-moz-document url-prefix() {
+  .sub-1{
+    display: inline-grid;
+  }
+}