Fix scrollbar visibility in firefox

src/components/hy-tabs/hy-tabs.scss

@@ -79,6 +79,7 @@
     margin: 0 0 -0.1em;
     overflow: scroll;
     position: relative;
+    scrollbar-width: none;
     white-space: nowrap;
 
     &::-webkit-scrollbar {
@@ -206,9 +207,7 @@
     }
   }
 
-  [role='tab']:hover,
-  [role='tab']:focus,
-  [role='tab']:active {
+  [role='tab']:hover {
     border-radius: 0;
     color: inherit;
     cursor: pointer;