Can I leave a log for HTTP/2 operations?

[email protected] Fri, 2 Jan 2015 00:40:09 -0800 (PST)
Newsgroups gmane.comp.mozilla.devel.netlib
Message-ID <[email protected]>
Hello, all.

I'm not sure that this mailing list is a right place for my question,
but I haven't met any relevant lists.

Can I leave a log for HTTP/2 activities of Firefox 34?