Hello @Edgar Sandé,
For sorting by a selection box,
Navigate to the file:
themes/{{your_theme}}/templates/catalog/_partials/products-top.tpl
Locate the following code snippet:
{block name='sort_by'}
{include file='catalog/_partials/sort-orders.tpl' sort_orders=$listing.sort_orders}
{/block}
Comment out or remove this code. this will hide both the "Sort by" text and the sorting field from your frontend.
For breadcrumb,
Navigate to the file:
themes/{{your_theme}}/templates/layouts/layout-both-columns.tpl
Locate the following code snippet:
{block name='breadcrumb'}
{include file='_partials/breadcrumb.tpl'}
{/block}
Comment out or remove this code. this will hide breadcrumb from your frontend.
In your PrestaShop admin panel, go to Advanced Parameters > Performance and click Clear Cache.
We hope this solution works for you!