The Immersive Web Working Group has published a First Public Working Draft of WebXR Lighting Estimation API Level 1. This specification describes support for exposing estimates of environmental lighting conditions to WebXR sessions.

The Web Fonts Working Group has published a First Public Working Draft of Incremental Font Transfer. This specification defines two methods to incrementally transfer fonts from server to client. Incremental transfer allows clients to load only the portions of the font they actually need which speeds up font loads and reduces data transfer needed to load the fonts. A font can be loaded over multiple requests where each request incrementally adds additional data.