1914134 - getDisplayMedia results in system permission prompt for Microphone on macOS

Status: VERIFIED FIXED

(Core :: WebRTC: Audio/Video, defect)

Description

[Andreas Pehrson [:pehrsons]]

Attachment: Screenshot of mic dialog after following STR

STR:

• Ensure there is no existing Microphone system permission for the Firefox you are testing. Clear it by, in a terminal, tccutil reset Microphone <BUNDLE_ID> where <BUNDLE_ID> is for instance org.mozilla.nightly for nightly release.
• Restart Firefox if it is running. (unsure if really needed)
• Go to https://mozilla.github.io/webrtc-landing/gum_test.html
• Click Screen Capture
• Once Firefox' permission prompt appears, wait for 5 seconds

Expected: nothing happens
Actual: sync (seems to block some API call) system dialog asking for user to allow Firefox using the microphone

Comment 1

[Andreas Pehrson [:pehrsons]]

On a hunch I tried setting media.getusermedia.microphone.voice_stream_priming.enabled=false and with that, the system dialog no longer appears.

Comment 2

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

Set release status flags based on info from the regressing bug 1903002

Comment 3

[Andreas Pehrson [:pehrsons]]

FWIW I marked this S4 because it only affects those users that have installed Firefox for the first time and use a service which makes a first gUM/gDM request that does not involve a mic, and I reckon that subset is a very small part of the overall user population.

Comment 4

[Andreas Pehrson [:pehrsons]]

Attachment: Bug 1914134 - Do not prime for voice unless Microphone has been requested. r?padenot

Comment 5

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/203e7b0db75d
Do not prime for voice unless Microphone has been requested. r=padenot

Comment 6

[Liz Henry (:lizzard) (relman/hg->git project)]

Marking as fix-optional for beta 130 based on the low severity rating; however, if you feel it is safe enough for uplift, please request it. Thanks!

Comment 7

[Serban Stanca [:SerbanS]]

https://hg.mozilla.org/mozilla-central/rev/203e7b0db75d

Comment 8

[Andreas Pehrson [:pehrsons]]

Attachment: Bug 1914134 - Do not prime for voice unless Microphone has been requested. r?padenot

Original Revision: https://phabricator.services.mozilla.com/D219733

Comment 9

[Phabricator Automation]

beta Uplift Approval Request

• User impact if declined: First-time users on macOS can be shown a Microphone permission dialog in video-only (camera/screen/window capture) use cases.
• Code covered by automated testing: no
• Fix verified in Nightly: no
• Needs manual QE test: yes
• Steps to reproduce for manual QE testing: See comment 0.
• Risk associated with taking this patch: Very low
• Explanation of risk level: Trivial; adds a new early-exit guard in the voice stream priming path.
• String changes made/needed: None
• Is Android affected?: no

Comment 10

[Andreas Pehrson [:pehrsons]]

Attachment: Bug 1914134 - Do not prime for voice unless Microphone has been requested. r?padenot

Original Revision: https://phabricator.services.mozilla.com/D219733

Comment 11

[Phabricator Automation]

esr128 Uplift Approval Request

• User impact if declined: First-time users on macOS can be shown a Microphone permission dialog in video-only (camera/screen/window capture) use cases.
• Code covered by automated testing: no
• Fix verified in Nightly: no
• Needs manual QE test: yes
• Steps to reproduce for manual QE testing: See comment 0 on the bug.
• Risk associated with taking this patch: Very low
• Explanation of risk level: Trivial; adds a new early-exit guard in the voice stream priming path.
• String changes made/needed: None
• Is Android affected?: no

Comment 12

[Pulsebot]

https://hg.mozilla.org/releases/mozilla-beta/rev/2c78fd6cfce9

Comment 13

[Pulsebot]

https://hg.mozilla.org/releases/mozilla-esr128/rev/18473970d0ce

Comment 14

[Catalin Sasca, Desktop Test Engineering [:csasca]]

Reproduced the issue on Firefox 131.0a1 (2024-08-21) on macOS 14.6.1 by following the STR provided in Comment 0.

The issue is fixed on Firefox 128.2.0esr, Firefox 130.0 and Firefox 131.0a1 (2024-08-27).