This is a cool article (from last year, FWIW). In particular, I like how Google uses Chrome browser improvements (the performance.memory API) to fix bugs in Gm

This is a cool article (from last year, FWIW). In particular, I like how Google uses Chrome browser improvements (the performance.memory API) to fix bugs in Gmail, and then in turn are able to reflect this back to use Gmail to notice bugs in Chrome. This sort of vertical integration that Google is able to do is really powerful (they were also able to take advantage of this to drive the development of SPDY), but a little concerning for anybody that has a browser but not a popular website, or vice versa. Although in this particular case, I don't think anybody else implements performance.memory, so there would be no easy way for Gmail to track memory usage in other browsers. Disclaimer: I work on Firefox and am speaking for myself, etc.