1883340 - mozregression-gui on Mac cannot capture camera or microphone

Status: NEW

(Testing :: mozregression, defect, P3)

Description

[Andreas Pehrson [:pehrsons]]

STR:

• On MacOS launch "mozregression GUI" from Spotlight
• in mozregression GUI launch some version of Firefox
• In the launched Firefox, go to https://mozilla.github.io/webrtc-landing/gum_test.html
• Click "Camera", "Microphone", or "Camera & Microphone"
• Approve the permission prompt

Expected result:
Firefox is actively capturing the requested and selected devices.

Actual result:
"NotFoundError"

Comment 1

[Andreas Pehrson [:pehrsons]]

This NotFoundError is because macOS rejects the capture request. Hypothetical, but I imagine this could be because mozregression-gui lacks the camera and microphone usage descriptions that Firefox has from its Info.plist file. MacOS uses the top-most parent process when handling permissions requests -- when using mozregression it uses permissions for Terminal.app, for instance. For mozregression-gui macOS doesn't ask the user, and mozregression-gui doesn't appear in system settings (under Privacy & Security -> Camera/Microphone). For "Screen Recording", i.e. the "Screen capture" button on the link in the STR above, it works as expected, but that doesn't need a usage description in Info.plist.

Comment 2

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

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

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