FF - scrollbar width

by nazarpunk

HTML

<div class="container">
  <div class="item"></div>
</div>
<div class="container">
  <div class="item"></div>
</div>

CSS

.container {
  width: 100px;
}

.container:first-child {
  overflow-y: scroll;
}

.item {
  height: 30px;
  border: 1px dashed red;
}