- Module works without building any change in the present PrestaShop file in order that existing customization and concept change do not affect. To employ these polyfills, simply include HTML boolean logic to put them, When the browser is a lot less than the desire IE Edition. Instance code is: https://hyperbookmarks.com/story19364608/everything-about-prestashop-seo-automatic-hreflang-tags-canonical-tags-on-all-pages