I have a div dropdown element. I'm using flexbox so I can easily order the contents using order:
.dropdown-content {
  overflow-y: auto;
  overflow-x: hidden;
  max-height: 200px;
  display: flex;
  flex-flow: column-reverse nowrap;
}<div class="dropdown-content">
  <div class="selectable" style="order: 700">Something</div>
  <div class="selectable" style="order: 100">Something</div>
  <div class="selectable" style="order: 800">Something</div>
</div>This works fine on Chrome, the content is scrollable, but Firefox refuses to show scrollbars. If I force the scrollbars, by setting  overflow-y: scroll; they're just disabled scrollbars.
I've tried adding min-height:0; min-width:0; but that does nothing.
 
    