I've been involved in DevTools dev for years, and I've both had and heard many good ideas to improve it.
It's always a special feeling seeing on of them finally take shape.
Latest one to date: detect CSS properties that don't have an effect on the current element.
Sneak peek:
A few years ago I pitched an idea to my boss at Mozilla. Today, we announce support for same-site cookies in @firefox. Thanks @joewalker, @mikewest, Christoph Kerschbaumer, @fmarier, @mozsec and everyone else that listened or helped along the way: https://t.co/vthyOzblms