1773785 - Wrong preview shown in getDisplayMedia picker when Screen Recording permission is not granted on Mac

Status: NEW

(Firefox :: Site Permissions, defect, P3)

Description

[Jan-Ivar Bruaroey [:jib] (needinfo? me)]

Attachment: SelectionAndPreviewMismatch.png

+++ This bug was initially created as a clone of Bug #1772233 +++
Steps to reproduce:

1. Remove Firefox from Mac Preferences>Security&Privacy>Screen Recording
2. Open https://jsfiddle.net/jib1/q75yb8pf/ and click the Present! button
3. Select "Entire desktop"
4. Select another window

Expected result:

• The preview of "Entire desktop" is replaced by no preview. This is expected, because in this pre-permission state in macOS, only the entire desktop and our own window have (limited) previews. None of the other windows have previews (same as in Chrome)

Actual results:

• The preview of "Entire desktop" remains, even though the current selection is a window. When cycling through choices, the preview only updates when the current window or entire desktop are selected, suggesting this is a (lack of) update bug.