Solution
In Firefox you can disable the Web Audio API "AudioContext" to prevent this.
In "about:config", search for "dom.webaudio.enabled", and set it to "false".
To make sure it's properly disabled check the "AudioContext" section on https://www.deviceinfo.me
There's also browser extensions that exist to disable the API, but using the setting directly in Firefox is all that's needed.
Biting the hand that feeds IT
