Ed hacks on all sorts of Firefox features including Generative AI, Onboarding, Firefox Home and even older Content Services (Tiles, UP, Interest Dashboard, Subscribe2Web) and Labs (Sync, Account Manager, Prospector). He also helps out with neat Firefox features like the Awesome Bar to help users quickly get to what they want. (Or maybe it's that Ed wants to get quickly to news about Mario and Nintendo games, and everyone benefits!)