There’s websites decided to pointing out which standards various browsers do & don’t support. https://caniuse.com/ https://caniuse.com/ (An older not as relev

There’s websites decided to pointing out which standards various browsers do & don’t support. https://caniuse.com/ https://caniuse.com/ (An older not as relevant one is http://acid3.acidtests.org/ http://acid3.acidtests.org/ )