[wyday]

It exists. Pick up a device that support ARM64 Windows 10 and it has compatibility with x86 programs (via an emulation layer like WoW64).

This announcement is for Firefox for ARM64 Windows 10 (without using the emulation layer). So, faster, uses less battery, etc.

[WorldMaker]

Plus it will be great to have an ARM64 alternative to Chromium given the disbanding of the EdgeHTML renderer.