Error with Permissions-Policy header: Origin trial controlled feature not enabled: 'interest-cohort'.

[flachware]

We get this warning in the browser console because GitHub Pages has disabled FLoC but we use navigator.platform and navigator.userAgent in the OS helper.

[inukshuk]

On Firefox we also get a warning for the Apple M1 detection. Need to change it to w.getParameter(w.RENDERER).

[inukshuk]

Where do you get this error?

I've updated the helper to user the low entropy client hints if available -- does that get right of the error for you?

We could use the high entropy hint 'architecture' to reliably detect arm64 on macOS on Chrome. That would mean we could detect M1 on Firefox (via the GPU) and on Chrome via the hint. Still no idea what to do about Safari though.