_breadcrumbs.html

{% if page.level > 0 %}
{% assign home = page.parent %}
{% else %}
{% assign home = page %}
{% endif %}

{% if page.has_parent? %}

<ol class="breadcrumb">
  <li><a href="/">Home</a></li>
  {% for ancestor in page.ancestors %}
  {% if ancestor.is_homepage? == false %}
  <li><a href="{{ ancestor.url }}">{{ ancestor.name }}</a></li>
  {% endif %}
  {% endfor %}
  <li class="active">{{ page.name }}</li>
</ol>

{% endif %}