This is a comment I posted on the other community.
Yes, librewolf is running. I intentionally have it open. But there is no audio playing.
When I kill the process, it does not unblock, even though there is no librewolf process left.
When I reboot the computer and restart librewolf, it does not block.
When I play a video in the browser, it blocks again.
When I close that tab, it is still blocked.
When I close the browser, it is still blocked, even though there is no librewolf process left.
(This is the Flatpak version, if that helps)