1985741 - picture in picture doesn't work on Android with privacy.resistFingerprinting enabled

Status: NEW

(Core :: Privacy: Anti-Tracking, defect)

Description

[NSM]

User Agent: Mozilla/5.0 (Android 10; Mobile; rv:143.0) Gecko/143.0 Firefox/143.0

Steps to reproduce:

Play any YouTube video.
Go to full screen.
Then, press home button.
Picture in picture mode will enabled.

Actual results:

Picture in picture mode stopped. Can't play video in picture in picture mode .
See video you can understand

Expected results:

Should play.

Comment 1

[NSM]

Attachment: VID_20250828163814.mp4

Comment 2

[BugBot [:suhaib / :marco]]

The Bugbug bot thinks this bug should belong to the 'Firefox for Android::Media' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 3

[BugBot [:suhaib / :marco]]

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

For more information, please visit BugBot documentation.

Comment 4

[Titouan Thibaud [:titouan]]

Thanks for reporting this bug. I can't reproduce it.
Which device model and Android version are you using? Are you using any extension? 

Can you please take a profile while reproducing the bug and share it here? It might be useful for debugging.

• Open Settings, About Firefox
• Tap 5 times on the Firefox logo
• Go back to the Settings screen, scroll down and tap the last item, "Start Profiler"
• Click "Start Profiler"
• Reproduce the bug
• Open the Settings screen again, scroll down and tap "Stop Profiler"
• Tap "Upload profile"
• The URL of the profile will then be added into your Clipboard. Paste it in a comment here. (you might want to email it to yourself, so that you can comment on a different device for example)

Thanks a lot in advance!

Comment 5

[NSM]

https://profiler.firefox.com/public/6h4xy8c3zqcz8e644823fb5egwvvngky5hw9s1g

'privacy.resistFingerprinting' turn this into true.
Then, you will see the problems

Comment 6

[Titouan Thibaud [:titouan]]

I could reproduce the bug with this settings enabled. I updated the bug title to reflect that important information.

Moving to Core / Audio/Video, as I think it probably belongs there.

Comment 7

[BugBot [:suhaib / :marco]]

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

For more information, please visit BugBot documentation.