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