app.telemetry Page Speed Monitor от app.telemetry

Get the page load times of any web page! app.telemetry Page Speed Monitor shows offset and duration of each step during the page load based on W3C navigation timing. As soon as you access a page, you see the load time in the menu bar and detailed information is only a click away.

For more on the metrics, please see:
https://www.apptelemetry.com/en/page-speed-monitor.html