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I’ve seen keyboards that allow firmware upgrades & configuration over WebUSB. This covers not just Linux but even smaller OSs as well as the audience using Android tablets as a PC or whatever.

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WebMIDI is also a boon for anybody working with external audio gear on Linux, some companies like Novation went all in and provide web-based firmware updaters and configuration tools. For other gear I still need to boot up a Windows VM and fiddle with USB forwarding.

The permission prompt in Firefox is definitely sensible though (especially for SysEx), not sure if Chrome added that as well.

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