Couldnt we add some "usb descriptor flag" which says whether WebUSB should be allowed or not? Then firefox/chrome would not need to maintain a blocklist.
off topic, but why does the page (step 2) rant about protonmail?
Can somebody elaborate?
>Be advised that Protonmail is generally known to be a pretty bad email host. [...] Not to mention their mistreatment of open source and false promises of security! You should consider a different mail provider.