Also, non-multipoint Bluetooth.

I use ublock origin and by default it wasn't blocking, i had to make a custom filter to block the scripts in order for it to prevent the audio takeover. Maybe adguard does a better job? Someone else suggested just wholesale disabling of JS but it is the nuclear option.

Does it hold an audio stream open constantly or just briefly during the challenge? On AE it never stops

Yes. In this case probably not fineeprinting is not allowed because not strictly necessary (cookie law) and therefore needs consent from user.

Going batshit with browser APIs is also a formidable GDPR defense. e.g. try browsing the privacy-related forms for Google (https://myaccount.google.com) on Firefox :D (entire browser freezes up every other second for me, because of some extremely important work Google needs to run on my CPU to let me scroll down on a static site containing roughly 30 words)

Will do! edit - How do i do this? through github issues? https://github.com/uBlockOrigin/uAssets/issues