- The beta is definitely not rock-solid stable yet but reasonably runs a majority of major websites. The current branch of Ultralight is based off of a stable branch of Safari/WebKit.

- The Ultralight library itself has no dependencies on D3D11 or Metal. The renderer emits virtual GPU driver commands that are consumed by the user (see GPUDriver.h). We ship a few stock implementations of GPUDriver for major platforms but users can undoubtedly write their own.