How can I use the network monitor with a HTTP/2 connection?

Developer Tools
#1

I found multiple pages recently that cause problems with the network monitor in firefox developer tools. I attached an image as an example:

2020-04-01-04-22-49-cd5f56
2020-04-01-04-22-49-cd5f561603×960 236 KB

The three requests are selected always as a “block”. They seem to be somehow related but I do not find any documentation what their relation is. My educated guess (also see https://superuser.com/questions/1537396/what-is-the-reason-firefox-combines-multiple-requests-in-the-network-monitor) that it is HTTP/2 related. However I still do not get how to handle debugging in such circumstances. I’d like to see the individual requests and answers for debugging purposes. I do not find a way to reach that goal. Is it a technical restriction?

I already asked this question on the user forum of Mozilla. Just for cross-reference.

#2

Sorry for the trouble, this is definitely a bug. I filed it in https://bugzilla.mozilla.org/show_bug.cgi?id=1628162 to track the root cause diagnosis and fix.

Have you found a reproducible case that we can use? I was looking at Mozilla’s riot instance but could not find requests with that issue.

#3

I just checked it once more. I cannot provide a reproducible case. This is unfortunate, I know.

Maybe an update changed this behavior. If I tried to redo what was the issue back then, all requests are individually selectable (and thus debuggable).