How to set full width product description and features on product page?
Open: /themes/classic/templates/catalog/product.tpl
Find line containg:
{block name='product_tabs'}
Insert code before this line:
</div>
</div>
</div>
<div class="row">
<div class="col-md-12">
<div>
Don't forget to chceck Advanced parameters -> Performance ->
Set this value to "Force compilation" to see changes".
This change was tested on Prestashop 1.7.3.1