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Device: POCO M6 PRO 5G Device Model: 23076PC4BI Android version: 15 AQ3A.240912.001 Firefox version: 147.0.3

Issue description: Firefox for Android stops playing audio and video in the background whenever I switch to a new tab or move the app to the background.

This happens on multiple websites such as YouTube,YouTube Music, Spotify Web Player, and other media streaming sites. As soon as Firefox is not in the foreground, playback pauses automatically. this issue persist in every media playing sites.

Steps to reproduce: 1. Open Firefox on Android 2. Play any video or music (for example on YouTube or Spotify web) 3. Open a new tab or switch to another app 4. Audio/video stops immediately

Expected result: Media should continue playing in the background, similar to other browsers or previous Firefox behavior.

Actual result: Playback stops as soon as Firefox loses focus or is sent to background.

Additional information: - Happens every time - Tried restarting phone and reinstalling Firefox - Battery optimization settings disabled for Firefox - Issue does not occur in other browsers

I remember in the past being able to disable videos from playing on a page and having a play button I could click to play them manually, am I hallucinating or is this a feature I cannot seem to find ?

I have a gpu rtx 50 and recently decided to use rtx super resolution to improve watching online videos but I can't make it work on firefox, I'm currently using the DEV Edition x64 latest version HW Acceleration is enabled and I also tried modifying via about:config the lines: media.peerconnection.video.use_rtx gfx.webrender.overlay-vp-super-resolution gfx.webrender.super-resolution.nvidia

It still doesn't work! tested in the other versions of firefox and it also did not work Using brave, chrome and edge..works normally without having to do anything. Does anyone know what it can be???

The same thing happens on my two Dell laptops (Inspiron and Latitude), and a Hyper-V VM (on my desktop PC). They all run Bazzite Linux 6.17.7-ba25.fc43.x86_64.

A video may play for a second or two, and then it's either a black screen, or an error message of "The content doesn't seem to be working."

On the same two laptops and VM, the Chromium Browser, and LibreWolf (a fork of Firefox?), have no issues playing the same videos.

Firefox version on all three systems is 147.0.3.

Any help/guidance welcome with thanks.