Blitzscaling is the ultimate test for managers and company builders. As employee count increases and communication becomes harder, a lot can break down. Founders that can weather these challenges and evolve their management practices build strong, enduring companies. Greylock's John Lilly experienced this hypergrowth first hand as CEO of Mozilla, the organization behind Firefox, the open source Web browser used by more than 450M people. In this discussion with Blitzscaling co-author Chris Yeh, John shares tactical advice to navigate key team transitions, hire for fast decision making, and build a strong company culture.