In additon to elisolution's solution earlier mentioned, this also checks no matter whether we are actually on the home web site (not only whether the canonical was set or not). I analyzed this Answer a tiny bit and as far as I'm 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