Knowing what will come and be available is also a valid use case. If you want to know about support every feature has links to MDN and caniuse, just check there

Knowing what will come and be available is also a valid use case. If you want to know about support every feature has links to MDN and caniuse, just check there. The web isn't as simple as comparing iOS/Android. For example Firefox on desktop isn't Firefox on Android and Firefox on iOS is just Safari. The web is a complex ecosystem.