Vulkan, min GPU needed for WebGPU, Mobile browsers etc.

Hi,
I'm a bit confused about this whole thing, so thought I'd ask here. As I
understand it, Vulkan is like, the next OpenGL, right? Made to take on
Microsoft? So does/will WebGPU use Vulkan? What would be the
advantages/disadvantages of doing so or not doing so?

Also - since Vulkan is available on mobile, will/is WebGPU also available
on mobile browsers?? What is the current support, and which minimum Firefox
(and Android) is needed?


Also, what is the min GPU needed to run WebGPU? (I'm talking about desktop,
but also tell me for mobile...)




Thanks.