Entering the Quantum Era—How Firefox got fast again and where it’s going to get faster

Over the past seven months, we’ve been rapidly replacing major parts of the engine, introducing Rust and parts of Servo to Firefox. Plus, we’ve had a browser performance strike force scouring the codebase for performance issues, both obvious and non-obvious.
We call this Project Quantum, and the first general release of the reborn Firefox Quantum comes out tomorrow.

Link: https://hacks.mozilla.org/2017/11/entering-the-quantum-era-how-firefox-got-fast-again-and-where-its-going-to-get-faster/