> "We built two new iOS frameworks with hundreds of new APIs to support functionality used by web browsers, including multiprocess, JIT, and advanced keyboard &

> "We built two new iOS frameworks with hundreds of new APIs to support functionality used by web browsers, including multiprocess, JIT, and advanced keyboard & touch event access — and we are pivoting WebKit to use these new frameworks." "Used by web browsers" implies that these APIs were designed to be used by both 3rd-party rendering engines and WebKit, which is interesting. It would mean that Apple's been building OS infra for 3rd-party browsers for many years.