firefox+discord keep pipewire active until firefox quits

Not knowing where the issue lies, here is what I know so far. Starting firefox, opening discord, then closing the tab and clearing all data. I see in 'top' that pipewire processes stay active (this is an i7-9700): PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 100766 eyal 9 -11 317308 41856 6704 S 4.7 0.1 113:55.84 pipewire-pulse 64810 eyal 9 -11 344036 19832 8004 S 2.3 0.1 55:30.94 pipewire The two stay at the same level of %CPU, and they were barely noticeable before visit discord. When I close firefox the activity stops, but not earlier. Disabling all add-ons has no effect. Using sound in other ways (firefox+youtube, vlc, etc.) does not lead to such activity. What is keeping this activity going, and how do I stop it? TIA -- Eyal Lebedinsky (fedora(a)eyal.emu.id.au)