> it should come with similar permission requests that use of microphone or camera do.

Such permissions requests have been associated I think exclusively with input and output, not computation.

Right, but I think it should change. I think consumers should have a say when a website wants to compute things that are out of scope for a normal page of text/information. I certainly dont want my laptop hot, slow, an poorly responsive because some news site's borderline malware is running several poorly built and implemented models that aim to track and predict my behaviour from mouse movement etc.