CSS 伪元素中的指针事件在 Firefox 中不起作用

CSS pointer-events in pseudo element not working in Firefox

我有一个水平菜单,中间点(通过 ::after 伪元素插入)分隔菜单项。我想禁用中间点上的链接。

在 Safari 中这按预期工作,但在 Firefox (v.47) 中,pointer-events: none 被忽略。

有人知道解决方法吗?

我的代码(还有一个 Fiddle:https://jsfiddle.net/54gmfxax/):

a {
  text-decoration: none;
}
ul li {
  list-style-image: none;
  list-style-type: none;
  margin-left: 0;
  white-space: nowrap;
  display: inline;
  float: left;
}
ul li a::after {
  padding: 0em 1em;
  content: '[=11=]b7';
  pointer-events: none;
}
ul li.last a::after {
  content: none;
}
<ul class="menu">
  <li class="first"><a href="#1" title="">Item 1</a>
  </li>
  <li class="leaf"><a href="#2" title="">Item 2</a>
  </li>
  <li class="leaf"><a href="#3" title="">Item 3</a>
  </li>
  <li class="last leaf"><a href="#4" title="">Item 4</a>
  </li>
</ul>

而不是将 ::after 伪元素放在锚元素上:

ul li a::after {
  padding: 0em 1em;
  content: '[=10=]b7';
  pointer-events: none;
}
ul li.last a::after {
  content: none;
}

...将它们放入列表项中:

ul li::after {
  padding: 0em 1em;
  content: '[=11=]b7';
  /* pointer-events: none; (not necessary) */
}
ul li.last::after {
  content: none;
}

a {
  text-decoration: none;
}
ul li {
  list-style-image: none;
  list-style-type: none;
  margin-left: 0;
  white-space: nowrap;
  display: inline;
  float: left;
}
ul li::after {
  padding: 0em 1em;
  content: '[=12=]b7';
  pointer-events: none;
}
ul li.last::after {
  content: none;
}
<ul class="menu">
  <li class="first"><a href="#1" title="">Item 1</a>
  </li>
  <li class="leaf"><a href="#2" title="">Item 2</a>
  </li>
  <li class="leaf"><a href="#3" title="">Item 3</a>
  </li>
  <li class="last leaf"><a href="#4" title="">Item 4</a>
  </li>
</ul>