[Deprecation] chrome.loadTimes() is deprecated, instead use standardized API: Paint Timing. https://www.chromestatus.com/features/5637885046816768
[Deprecation] chrome.loadTimes() is deprecated, instead use standardized API: Navigation Timing 2. https://www.chromestatus.com/features/5637885046816768

The Microsoft non-standard extension of Navigation Timing for msFirstPaint, and Chrome's implementation via chrome.loadTimes() have been standardised as part of a new Paint Timing API.

We already briefly experimented this as part of the Asia Sample code we had until recently, but we should switch our main code to use it as well where available.