That firmware update was made possible by the fwupd software project (containing various firmware updaters) and the LVFS project, a service for hardware vendors to upload their proprietary firmware updates for mice, the BIOS/UEFI and other devices to.
While it is great, it doesn't solve the problem that this post is talking about; when devices have no pre-installed firmware and expect you to upload (proprietary) firmware on every boot. This is usually things like WiFi chips, GPUs, Ethernet etc.