Test Pilot isn&#x27;t happening at the cost of stability and performance improvements. It&#x27;s a complementary program that helps us ship better features through data-driven iteration.<p>I hear your concerns, though. The platform and desktop teams are doing tons of great work on improving stability and performance--you might want to give Firefox another try sometime. If you do, maybe try out some Test Pilot experiments while you&#x27;re at it, and let us know what you think.