Yes, but instead of saying "this spec is shit and full of vulnerabilities. Let's work on improving it", they just refused to participate in the discussion. What a childish POV.
I don't think that's a fair summary of Mozillas Position on the WebBluetooth/WebSerial/WebUSB specs. Interacting with arbitary devices has arbitrary consequences, mozilla seems to assume users are not able to understand these consequences and therefore cannot consent to it.