1935479 - Can't share Firefox window From MS Teams

Status: RESOLVED WORKSFORME

(Core :: WebRTC, defect)

Description

[Brad Landis]

Attachment: Screenshot 2024-12-04 102706.png

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:134.0) Gecko/20100101 Firefox/134.0

Steps to reproduce:

1. Join a Teams meeting.
2. Attempt to share my Firefox window.

I think I first saw this in 133 Beta versions, but it's still a problem in 134. (Of course, it could be a problem with Teams, I'm not sure.)

Actual results:

1. It appears to share on my end, but for other users, they only see a black screen.
2. Also when starting to share the screen, Firefox doesn't show the preview of what's in the window.

Expected results:

1. I should be able to share my Firefox window.

Comment 1

[Brad Landis]

I tried submitting my issue here first: https://support.mozilla.org/en-US/questions/1477185

Comment 2

[Reto Schneider]

Works fine here using Firefox 133.0 on Debian 12 (X11) and Debian Testing (Wayland). Willing to test if you tell me what exactly.

Comment 3

[Brad Landis]

Perhaps it's a Windows only problem?

Comment 4

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

The severity field is not set for this bug.
:mjf, could you have a look please?

For more information, please visit BugBot documentation.

Comment 5

[Byron Campen [:bwc]]

This might have been triggered by a libwebrtc update, or maybe bug 1908245? It might have been something longer ago though.

Could you use mozregression to narrow down when this started happening?

https://mozilla.github.io/mozregression/quickstart.html