1496434 - RTCPeerConnection.createOffer never fulfilled in responsive design mode (aMessage.target.contentPrincipal is undefined)

Status: NEW

(DevTools :: Responsive Design Mode, defect, P2)

Description

[mpbush]

Attachment: test-createoffer.html

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:62.0) Gecko/20100101 Firefox/62.0

Steps to reproduce:

I wrote some RTC code and opened it in firefox, I then opened Responsive Design mode and reloaded the page.


Actual results:

In normal mode the promise is fulfilled and the offer is created (you can see in the console)
In RDM, the promise is never fulfilled.


Expected results:

The offer should be created in RDM

Comment 1

[Andreas Pehrson [:pehrsons]]

I can confirm this. I also see this in the browser console (where chrome errors show up):

> aMessage.target.contentPrincipal is undefined    webrtcUI.jsm:206 [1]
>   receiveMessage resource:///modules/webrtcUI.jsm:206:11
>   receiveMessage jar:file:///usr/lib/firefox-trunk/browser/omni.ja!/components/nsBrowserGlue.js:257:30
>   receiveMessage self-hosted:1031:17

Not sure why we wouldn't have a principal there, but this seems more like an issue with responsive design mode than with our webrtc implementation. Moving to the RDM component.


[1] https://searchfox.org/mozilla-central/rev/924e3d96d81a40d2f0eec1db5f74fc6594337128/browser/modules/webrtcUI.jsm#206