No audio with surf suckless.org web browser

The surf web browser of [suckless.org](https://surf.suckless.org) is not playing any audio. It was installed from the repositories on Xubuntu LTS 20.04.1. The default pulseaudio sound server works fine with other applications such as vlc. When running surf from the command line, for example: $ surf -m -a @ http://heppen.be:8091/m.html I receive the following warnings: (surf:25703): dbind-WARNING **: 15:44:29.674: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-NDwOQIOpuu: Permission denied (WebKitWebProcess:25718): dbind-WARNING **: 15:44:29.833: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-NDwOQIOpuu: Permission denied What is going wrong that pulseaudio is not receiving any audio from surf? Another consideration is that surf depends on libwebkit2gtk. I am not sure if there is something similar to chrome://settings/content/sound as in [Blink engine](https://en.wikipedia.org/wiki/Blink_(browser_engine)) browsers?