The browser itself shouldn't have access to raw devices, as that means giving all programs running under your user the ability to flash your keyboard firmware.
The point of flatpak, wayland, etc is to prevent software from having access to everything. Making all USB devices readable and writable again circumvents the entire sandboxing concept of modern systems.
The point of flatpak, wayland, etc is to prevent software from having access to everything. Making all USB devices readable and writable again circumvents the entire sandboxing concept of modern systems.