Add back button to prestashop1.6 inside product page

This code shows how to add back button inside prestashops product page, The button will only show if you are inside a product page ,you can also add the codes to breadcrumbs.tpl for better viewing

{if $page_name == 'product'} 
 <div class="pull-right">   
   <a class="backCat" href="{$link->getCategoryLink($category->id_category, $category->link_rewrite)|escape:'html':'UTF-8'}" title="Back"><i class="fa fa-arrow-left"></i> Back</a>
 </div> 
{/if}

Css

.backCat{
 display: inline-block;
 padding: 0px 11px;
 border: 1px solid #D6D4D4;
 font-weight: bold;
 font-size: 12px;
 line-height: 24px;
 min-height: 6px;
 border-radius: 3px;
 overflow: hidden;
 margin-bottom: 16px;
 position: relative;
 z-index: 1;
}

In some case, if the category of our product is two or more, we can use an alternative that is much simple

<a class="backCat" href="{literal}javascript:history.back();{/literal}" title="Back"><i class="fa fa-arrow-left"></i> Back</a>