In additon to elisolution's reply above, this also checks irrespective of whether we are actually on the home web site (not simply whether the canonical was established or not). I examined this Resolution a little and so far as I am able to see, it really works as expected. Or else, https://addons.prestashop.com/en/seo-natural-search-engine-optimization/31857-automatic-google-rich-snippets-json-ld-open-graph-seo.html