Each of the major browsers use different rendering engines. I assume this is the massive motive why there are such a lot of cross-browser compatibility problems! It's not at all similar to "all td, th and caption elements that are contained by a div factor with a class of test". https://bookmarkangaroo.com/story19488126/everything-about-prestashop-seo-automatic-hreflang-tags-canonical-tags-on-all-pages