...because it already was? The whole thing started as a collaboration between Mozilla and the EFF. Its success allowed Josh to spin it out into an independent organization, and focus on it full-time.
There are many other fronts that Mozilla is fighting on, just less visibly: WebAssembly, Rust, Daala/AOMedia, WebVR, etc.
Having lived through the first browser wars, I can think of few things more important for the safety and health of the Internet than a vibrant, competitive browser market. And with the progress being made on Servo and Quantum, I suspect conceding to Chrome would be premature.
Source: I am a Mozilla employee and a board member of ISRG (which operates Let's Encrypt).
Mozilla is a platinum-level sponsor of Let's Encrypt. https://letsencrypt.org/sponsors/
If we're going back in time, please bring back the original https://en.wikipedia.org/wiki/Mozilla_(mascot)#/media/File:M...