Mozilla Quantum: New Browser Engine Based On Servo/Rust For Firefox
Written by Michael Larabel in Mozilla on 28 October 2016 at 02:27 PM EDT. 36 Comments
Mozilla's latest secret project to go public is Quantum, a new browser engine for Firefox. But before wondering what happened to Servo, don't worry, Quantum makes use of Servo and Rust.

Servo continues to be developed and Quantum is the project aiming to be a replacement to Gecko within Firefox. The hope is to transition to Quantum in mainline Firefox by the end of next year. The migration to the new engine is expected to be gradual over 2017 as Gecko gets gutted and replaced by Servo/Quantum code.
Quantum is Mozilla's project to build the next-generation web engine for Firefox users, building on the Gecko engine as a solid foundation. Quantum will leverage the fearless concurrency of Rust and high-performance components of Servo to bring more parallelization and GPU offloading to Firefox.

As the project evolves we'll be adopting more of Servo's components, and leveraging the research that helped build them, to make Firefox faster and more reliable than ever. Servo is a research project and doesn’t yet have all the functionality users expect from a full-featured web browser. By taking an incremental approach and merging proven components from Servo to Gecko as they are ready, users won't have to wait long to start seeing dramatic improvements to Firefox stability and performance. We're going to ship major improvements in 2017, and we'll iterate from there.
Limited details so far via the Quantum Wiki page. Some early work on Quantum is focused on Quantum CSS )Stylo), Quantum Render for next-gen renderer making use of GPU rendering (WebRender), Quantum Compositor as the GPU code that will run in its own process, Quantum DOM, and Quantum Flow.

There is also this recent presentation on Quantum/Servo:

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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter or contacted via

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