Hello WPT team.
We are a bunch of dev working to increase performance a website trying to add a custom header to check render blocking elements. On the advanced setting under the custom header I am giving header in this way "addHeader DR_TEST: GCP " took this URL as reference. https://sites.google.com/a/webpagetest.org/docs/using-webpagetest/scripting.
I don’t see the page is loaded in GCP even custom header is defined. a solution to this ASAP is appreciated.