Anyway, if you have $50M, you can afford 500 people at $100k, or 250 people at $200k. So you simply declare, this is how many people it takes to make a browser, and set your goals and timetables accordingly. I feel like the goals and direction might be more important than the number of bodies you throw at it, but maybe that's naïve. But when the product is mature like Firefox (or Chrome for that matter) you do have some flexibility on the headcount.