I’m a Mozilla employee. > Quantum uses a new UI framework called Photon Photon is just the UX design guidelines that were overhauled with Quantum. Having said

I’m a Mozilla employee. > Quantum uses a new UI framework called Photon Photon is just the UX design guidelines that were overhauled with Quantum. Having said that, they were developed in close collaboration between the UX designers and UI engineers to ensure that it performs as best as it possibly can. > new CSS engine and rendering architecture called Servo Servo is an experimental engine developed by Mozilla Research. Its style system, dubbed Stylo, was adapted for use by Gecko. > and the compositor has been completely overhauled to integrate Servo. Gecko’s compositor was moved into its own process during Quantum, and Servo’s graphics subsystem, WebRender, is in the process of being gradually deployed on release, with several more cohorts pending.