This is the API side of #3149 From [here](https://github.com/gpuweb/gpuweb/issues/3149#issuecomment-1433869176): >* The API side exposes a list of supported features (as a list of strings) > * This allows applications, and the CTS, to see what is supported. > * Discussion: is this on the adaptor, or the device? Argument in favour of the adaptor is that these are "sugar" features.