Lastly, the “Quantum DOM” project began overhauling how Firefox prioritizes work, responding more quickly to events like user input while delaying less urgent computations until the browser is idle. Additionally, the “Quantum Flow” team tracked down and fixed 369 performance bugs in Firefox, with a special focus on responsiveness and UI interactions. Why does this feel like a brand new browser? Read on! Firefox Quantum: Towards a next-gen browserĭeveloper Edition now includes “Quantum CSS,” an entirely new CSS engine written in Rust and based on the Servo parallel browser engine project.

To celebrate, we gave Developer Edition a brand new logo: We’ve shipped many incremental improvements to Firefox in the past, but this release marks the first milestone where we believe Firefox fundamentally feels like a newer, better browser.

Firefox Quantum is now available in Developer Edition, and this Firefox is fast.Īs a reader of the Hacks blog, you may be familiar with Project Quantum, our attempt to refactor, redesign, replace, and modernize the very core of Firefox.

Mozilla firefox browser very slow