== Quantum DOM ==
The '''Quantum DOM''' project will make Gecko more responsive, especially when there are a lot of background tabs open. When Quantum DOM is researching how to improve UI responsiveness by aggressive throttling of CPU-heavy finished, JS code for different tabs (and possibly different iframes and ) will run in separate cooperatively scheduled threads; the code for some background tabs and smarter JavaScript garbage collectionwill never run at all. Bill McCloskey wrote more about [https://billmccloskey.wordpress.com/2016/10/27/mozillas-quantum-project/ Quantum DOM on his blog].
== Quantum Flow ==
The '''Quantum Flow''' project will explore performance improvements not covered by the other Quantum components, such as UI optimizations.