I was just messing around with it the other day and i found out that you can set your own music to play while the flames are burning
okay here's how to do it:
1.Go into "Configure Free Fire Screensaver"
2. Click on sound in the left side
3. navigate to background music and select "play user's music"
4. Load the song you want to played when the the screensaver is on.
5. Select the volume of the song
6. Navigate to "flame" Sound and select no sound (Only if you only want the music to play)