I’m not too familiar with the differences between the browsers implementations of web standards, but I really have to wonder about how well many standard are im

I’m not too familiar with the differences between the browsers implementations of web standards, but I really have to wonder about how well many standard are implemented if sites not using cutting edge standards and APIs don’t work in certain browsers. I can live if I can’t use WebUSB or WebSerial or something outside Chrime, but what on earth are these sites using so that just standard UI functions like shopping carts can’t work across browsers? On the other hand, I have noticed a few times where certain browser vendors cough Google cough will seemingly purposely ruin the UX of some of their sites if you aren’t using their browser.