In additon to elisolution's solution earlier mentioned, this also checks whether we are actually on the house web page (not simply whether or not the canonical was set or not). I analyzed this solution a tad and in terms of I am able to see, it really works as expected. Normally, https://addons.prestashop.com/pl/seo-pozycjonowanie-naturalne/31857-automatyczne-google-rich-snippets-json-ld-opengraph-seo.html