With nearly 400 million users, the changes we make to Firefox must be made with care. The cost of change for fiddling with a commonly used feature can be high for any one person — and when that cost is multiplied by 400 million the cost-at-scale is oppressive; even causing 10 seconds of confusion can waste over a million collective man hours. Change comes at a cost and it must be outweighed by change’s benefits. Yet, we can’t be better without being different.
The nearly 400 million current Firefox users is a testament to our ability to make those tough calls and change towards the better. As our user base continues to grow, those calls will only get tougher. We need to find technical and cultural ways to overcome the innovators dilemma and lower the cost of experimentation.

