prefers-color-scheme media queries. The work on WebRender started around four years ago with the goal of better utilizing modern graphics hardware.
WebRender will be enabled gradually for users on Windows 10 with qualified hardware. The engine fundamentally changes the way the rendering engine works to make it more like a 3D game engine. Written in Rust, WebRender is known for being extremely fast. But WebRender isn’t really about making rendering faster. It’s about making it smoother.
New in Firefox 67, the
prefers-color-scheme media feature allows sites to adapt their styles to match a user’s preference for dark or light color schemes, a choice that’s begun to appear in operating systems like Windows, macOS and Android. As an example of what this looks like in the real world, Bugzilla uses
prefers-color-scheme to trigger a brand new dark theme if the user has set that preference.
More info about this release could be found here.