Earlier quoted context omitted.
His point still stands, especially on iOS where other browsers isn't even allowed and every browser has to be basically a reskin of safari. That way others can't add features or stability, forcing developers to use the app store and give Apple a large cut. This is much more serious that the Microsoft case.
Firefox works fine on iOS
https://en.wikipedia.org/wiki/Firefox_for_iOS
https://developer.apple.com/app-store/review/guidelines/#2.5...
> 2.5.6 Apps that browse the web must use the appropriate WebKit framework and WebKit Javascript.