750 million people use Chrome. That's blind people, old people, young people, people who hate change, and sometimes, your cat.
How do we make sure that those people are having a good experience? Science! Mostly.
So, how do you build a usable product? What are user metrics and how do you make sure that your changes actually improve the product experience? How do you deal with user feedback, and what can we do about accessibility?
These are some of the things I've learned from a year of working on the Chrome UI.