If you're into podcasts, you should check this episode of Debug http://www.imore.com/debug-11-don-melton-and-safari : it's Don Melton's interview, former Engineering Director of Internet Technologies at Apple, talking about open-sourcing Mozilla, building Nautilus, creating WebKit and the Safari browser.

This one is also good, again with Don Melton, http://www.imore.com/debug-111-don-melton-blink-servo-and-mo... about Servo and Blink.