A UI refresh of the entire application, with a strong focus on improving UI performance. Treated as a sister project to Quantum Flow. This was released in Firefox 57. Network: Improve the performance of Necko, Gecko's networking layer, by moving more network activity off the main thread, context dependent prioritization of networking streams, and racing the cache layer with the network. This feature was released in Firefox 59. Azure The Mozilla Azure project is a stateless low-level graphics abstraction API used in Firefox. The project has several objectives including more accurate Direct2D compatibility, optimized state interoperability, and improved control over performance characteristics and bugs. Azure will provide 2D hardware acceleration on top of 3D graphics backends. Firefox began using Azure instead of Cairo in 2012. It is written in C++ and used by Servo. The Azure name is an ode to the early Netscape founder James H. Clark and his earlier work at Silicon Graphics where workstations were often named after colors. References External links Gecko - MDN Web Docs Gecko development wiki (wiki.mozilla.org) Mozilla Product Strategy Proposal (DRAFT) Web Browser Standards Support JRex (Java API for Gecko) Cross-platform software Free layout engines Free software programmed in C++ Free software programmed in Rust Mozilla Software that uses Cairo (graphics)