Hi,
I learned that apulse make running higher version of firefox without
pulseaudio.
I put stable, testing, unstable in the sources.list file.
After updating, apt-cache search apulse brings no package.
deb http://auto.mirror.devuan.org/merged jessie main contrib
non-free
deb http://auto.mirror.devuan.org/merged jessie-updates main contrib
non-free
deb http://auto.mirror.devuan.org/merged jessie-security main contrib
non-free
deb-src http://auto.mirror.devuan.org/merged jessie main contrib
non-free
# Devuan testing
deb http://auto.mirror.devuan.org/merged testing main contrib
non-free
deb http://auto.mirror.devuan.org/merged unstable main contrib
non-free