1641934 - Adding a Drag Space during screen sharing makes the Customization panel unresponsive when tab switch warning is enabled

Status: NEW

(Firefox :: Site Permissions, defect, P3)

Description

[Carmen Fat [:cfat] - Ecosystem QA]

Attachment: customization drag space.gif

[Affected Versions]:

• Firefox 77 RC-build 3

[Affected Platforms]:

• Windows 10 x64

[Prerequisites]:

• Firefox 77 RC-build 3 is installed.
• The following preferences are set:
  -> privacy.webrtc.allowSilencingNotifications = true
  -> privacy.webrtc.legacyGlobalIndicator = false
  -> privacy.webrtc.sharedTabWarning = true
• Have at least 2 tabs opened.

[Steps to reproduce]:

1. Open the browser with the profile from prerequisites.
2. Start a webRTC video call on Zoom and share the entire screen.
3. Right-click on tab strip and select the "Customize" option.
4. Select the "Drag Space" checkbox.
5. Click in the "Done" button and observe what happens next.

[Expected results]:

• The Customization panel is dismissed.

Actual results]:

• The Customization panel remains unresponsive.

[Notes]:

• This issue is only reproducible when sharing the entire screen or the meeting room.
• Attached is a .gif with the issue.

Comment 1

[Mike Conley (:mconley) (:⚙️)]

Are you able to reproduce this if privacy.webrtc.sharedTabWarning is set to false?

Comment 2

[Carmen Fat [:cfat] - Ecosystem QA]

• I was not able to reproduce the issue with privacy.webrtc.sharedTabWarning pref set to false.
• Tested on Windows 10 x64 with Firefox RC 77 (Build ID: 20200528194502) and Firefox Beta 78.0b2 (Build ID: 20200602134412)