You've probably heard of Project Quantum ... This is a project for substantial reworking of Firefox's insides to speed up the browser. In parts, we implement the experience of our experimental browser Servo and significantly improve the rest of the engine elements.
The project was compared with the replacement of an aircraft engine on the fly. We make changes to the Firefox component behind the component, so you can evaluate their effect in the next release of the browser as soon as it is ready.
Note. There are many illustrations under the cut. All of them are clickable (for viewing in higher resolution). If you stumble upon inaccurate translation and other errors - I will be grateful if you report this in the comments or in PM.