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OMG! module??? IMHO The right solution it change bredcrumb.tpl ONLY! All other solutions abnormal.
Here for native default-bootstrap theme ps 1.6.1.24 fully adapted for schema.org file breadcrumb.tpl

file content:

<!-- Breadcrumb -->
{if isset($smarty.capture.path)}{assign var='path' value=$smarty.capture.path}{/if}
{if !empty($path)}
{$matchCount = preg_match_all('/<a.+?href="(.+?)"[^>]*>([^<]*)<\/a>/', $path, $matches)}
{$breadcrumbs = []}
{for $i=0; $i < $matchCount; $i++}
{$breadcrumbs[] = ['url' => $matches[1][$i], 'title' => $matches[2][$i]]}
{/for}
{$match = preg_match('/>([^<]+)(?:<\/\\w+>s*)?$/', $path, $matches)}
{if !empty($matches[1])}
{$breadcrumbs[] = ['url' => '', 'title' => $matches[1]]}
{elseif !$match && !$matchCount}
{$breadcrumbs[] = ['url' => '', 'title' => $path]}
{/if}
{/if}
<div class="clearfix">
	<ol class="breadcrumb" itemscope itemtype="http://schema.org/BreadcrumbList">
		<li itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem"> 
			<a class="home" href="{if isset($force_ssl) && $force_ssl}{$base_dir_ssl}{else}{$base_dir}{/if}" title="{l s='Return to Home'}" itemprop="item">
				<i class="icon-home"></i>
			</a>
			<meta itemprop="name" content="{l s='Home'}" />
			<meta itemprop="position" content="1" />
		</li>
{if !empty($breadcrumbs)}
{foreach from=$breadcrumbs item=breadcrumb name=crumbs}
		<li itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem">
{if !empty($breadcrumb.url)}
			<a href="{$breadcrumb.url}" itemprop="item" title="{$breadcrumb.title}">
				<span itemprop="name">{$breadcrumb.title}</span>
			</a>
{else}
			<span itemprop="name">{$breadcrumb.title}</span>
{/if}
			<meta itemprop="position" content="{($smarty.foreach.crumbs.iteration|intval + 1)}" />
		</li>
{/foreach}
{/if}
	</ol>
</div>
{if isset($smarty.get.search_query) && isset($smarty.get.results) && $smarty.get.results > 1 && isset($smarty.server.HTTP_REFERER)}
<div class="pull-right">
	<strong>
		{capture}{if isset($smarty.get.HTTP_REFERER) && $smarty.get.HTTP_REFERER}{$smarty.get.HTTP_REFERER}{elseif isset($smarty.server.HTTP_REFERER) && $smarty.server.HTTP_REFERER}{$smarty.server.HTTP_REFERER}{/if}{/capture}
		<a href="{$smarty.capture.default|escape:'html':'UTF-8'|secureReferrer|regex_replace:'/[\?|&]content_only=1/':''}" name="back">
			<i class="icon-chevron-left left"></i> {l s='Back to Search results for "%s" (%d other results)' sprintf=[$smarty.get.search_query,$smarty.get.results]}
		</a>
	</strong>
</div>
{/if}
<!-- /Breadcrumb -->

OMG! module??? IMHO The right solution it change bredcrumb.tpl ONLY! All other solutions abnormal.
Here for native default-bootstrap theme ps 1.6.1.24 fully adapted for schema.org file breadcrumb.tpl

file content:

<!-- Breadcrumb -->
{if isset($smarty.capture.path)}{assign var='path' value=$smarty.capture.path}{/if}
{if !empty($path)}
{$matchCount = preg_match_all('/<a.+?href="(.+?)"[^>]*>([^<]*)<\/a>/', $path, $matches)}
{$breadcrumbs = []}
{for $i=0; $i < $matchCount; $i++}
{$breadcrumbs[] = ['url' => $matches[1][$i], 'title' => $matches[2][$i]]}
{/for}
{$match = preg_match('/>([^<]+)(?:<\/\\w+>s*)?$/', $path, $matches)}
{if !empty($matches[1])}
{$breadcrumbs[] = ['url' => '', 'title' => $matches[1]]}
{elseif !$match && !$matchCount}
{$breadcrumbs[] = ['url' => '', 'title' => $path]}
{/if}
{/if}
<div class="clearfix">
	<ol class="breadcrumb" itemscope itemtype="http://schema.org/BreadcrumbList">
		<li itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem"> 
			<a class="home" href="{if isset($force_ssl) && $force_ssl}{$base_dir_ssl}{else}{$base_dir}{/if}" title="{l s='Return to Home'}" itemprop="item">
				<i class="icon-home"></i>
			</a>
			<meta itemprop="name" content="{l s='Home'}" />
			<meta itemprop="position" content="1" />
		</li>
{if !empty($breadcrumbs)}
{foreach from=$breadcrumbs item=breadcrumb name=crumbs}
		<li itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem">
{if !empty($breadcrumb.url)}
			<a href="{$breadcrumb.url}" itemprop="item" title="{$breadcrumb.title}">
				<span itemprop="name">{$breadcrumb.title}</span>
			</a>
{else}
			<span itemprop="name">{$breadcrumb.title}</span>
{/if}
			<meta itemprop="position" content="{($smarty.foreach.crumbs.iteration|intval + 1)}" />
		</li>
{/foreach}
{/if}
	</ol>
</div>
{if isset($smarty.get.search_query) && isset($smarty.get.results) && $smarty.get.results > 1 && isset($smarty.server.HTTP_REFERER)}
<div class="pull-right">
	<strong>
		{capture}{if isset($smarty.get.HTTP_REFERER) && $smarty.get.HTTP_REFERER}{$smarty.get.HTTP_REFERER}{elseif isset($smarty.server.HTTP_REFERER) && $smarty.server.HTTP_REFERER}{$smarty.server.HTTP_REFERER}{/if}{/capture}
		<a href="{$smarty.capture.default|escape:'html':'UTF-8'|secureReferrer|regex_replace:'/[\?|&]content_only=1/':''}" name="back">
			<i class="icon-chevron-left left"></i> {l s='Back to Search results for "%s" (%d other results)' sprintf=[$smarty.get.search_query,$smarty.get.results]}
		</a>
	</strong>
</div>
{/if}
<!-- /Breadcrumb -->