Frederik Braun defends Mozilla Firefox as a Staff Security Engineer in Berlin. Besides enhancing the browser, he has also been involved in web and mobile security. Frederik contributes to the W3C Web Application Security Working Group and co-authored the Subresource Integrity standard. He's also a proud alumnus of the Fluxfingers CTF team. When not working on computer security, Frederik spends time with his family in Berlin or on long bike tours across Europe.