Fwupd

is Article description::a daemon that provides a safe, reliable way of applying firmware updates on Linux. Vendors can upload device firmware images to the Linux Vendor Firmware Service (LVFS) web portal. These firmware images are in turn distributed to devices running the firmware update daemon.

is colloquially referred to as Linux Vendor Firmware Service (LVFS), which is the name of the web portal used by vendors to upload device firmware.

USE flags
The above list of USE flag is not comprehensive. Use (part of the  package) for a full list:

OpenRC
Start :

Start at boot:

systemd
is launched through systemd via D-Bus automatically whenever it is needed.

Usage
Get help on what can do:

List detected and supported devices. When the device is listed but not displayed, a plugin (e.g. the  USE flag) is missing.

Refresh metadata from remote server:

Check available updates for your devices:

Install updates: