The audio from normal browsing continues to be played after entering PB mode

[Softvision-RemusDranca]

[Affected Versions]:

• Firefox Reality version 10-140862313 (3db73db).

[Affected Platforms]:

• HTC Vive Plus - Android 7.1.2
• Pico Neo 2 - Android - 8.1.0
• Oculus Quest - Android 7.1.1

[Prerequisites]:

• The headset is turned on and the app is opened.
• The volume is up.

[Steps to reproduce]:

1. Play a video with audio in normal browsing.
2. Click the Private Browsing button from the tray.
3. Observe if the audio from the video continues playing.

[Expected results]:

• No audio is playing.

[Actual results]:

• The audio continues to play in PM.

[Additional Notes]:

• Attached is a screen recording of the issue: link.

[bluemarvin]

This might be a recent GeckoView regression.

[bluemarvin]

Filed GeckoView issue https://bugzilla.mozilla.org/show_bug.cgi?id=1625615

[bluemarvin]

This is still waiting for a fix in Gecko.

[bluemarvin]

Fixed by #2521

[Softvision-RemusDranca]

I have verified this issue and it's no longer reproducible with the Firefox Reality version 10 RC1 (6db2f60). Now, the video is stopped when the application is paused or when entering/exiting Private Browsing.

Tested on HTC Vive Focus (Android 7.1.2), Oculus Quest (Android 7.1.1), and Pico Neo 2 (Android - 8.1.0) devices.