Currently it is difficult to debug the SignedHTTPExchange related loading errors.
We have TRACE_EVENTs in SignedHTTPExchange related codes.
So we can check the behavior using chrome://tracing.
But it is not Web developer friendly.
DevTools should provide a way to debug the SignedHTTPExchange related error.
And also it would be very useful if Web developer can check the content of CBOR envelope using DevTools.
Comment 1 by horo@chromium.org
, Apr 9 2018