In additon to elisolution's reply above, this also checks whether or not we are literally on the home web site (not just whether or not the canonical was established or not). I analyzed this Alternative a little and in terms of I am able to see, it really works as expected. https://addons.prestashop.com/nl/seo-zoekmachineoptimalisatie-vermelding/31857-automatische-google-rich-snippets-json-ld-opengraph-seo.html