In additon to elisolution's respond to over, this also checks whether or not we are literally on the house page (not simply whether or not the canonical was set or not). I tested this Option a tiny bit and as far as I can see, it works as anticipated. If not, https://addons.prestashop.com/fr/seo-referencement-naturel/31857-seo-automatique-google-rich-snippets-json-ld-open-graph.html