1958129 - WebSocket requests do not appear in the network panel when Responsive Design Mode is enabled

Status: NEW

(DevTools :: Netmonitor, defect, P2)

Description

[Alex]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:138.0) Gecko/20100101 Firefox/138.0

Steps to reproduce:

Open a website that communicates with a websocket while the developer tools network tab is open and the current browser tab has "Responsive Design Mode" turned on.

Actual results:

The websocket connection (101 protocol switch) request does not appear in the list of network requests.

Expected results:

The websocket connection should appear in the network requests tab

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'DevTools::Netmonitor' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[Nicolas Chevobbe [:nchevobbe]]

I can reproduce this on https://piehost.com/websocket-tester. Note that you first have to open DevTools, then turn on RDM and init the WS connection to hit the issue.
If you open RDM first, without DevTools, then open DevTools and init the WS connection, it shows fine in the Netmonitor.

Comment 3

[Julian Descottes [:jdescottes]]

I think we have a similar report of a missing request on RDM, will try to find it.