1. CSS Environment Variables env()

    Usage of environment variables like `safe-area-inset-top`.

  2. CSS Variables (Custom Properties)

    Permits the declaration and usage of cascading variables in stylesheets.

  3. WebAssembly Import/Export of Mutable Globals

    An extension to WebAssembly import and export of mutable global variables

  4. gpusupportedlimits api: maxinterstageshadervariables