Firefox v40 doesn’t play sound on Flash videos.

Debian 8.0 (Jessie)

Sound system: ALSA

The soultion I found was to change /etc/asound.conf file.

$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: SB [HDA ATI SB], device 0: ALC887-VD Analog [ALC887-VD Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0


/etc/asound.conf that fixed no sound problem of Firefox v40.

defaults.pcm.card 0
defaults.pcm.device 0
defaults.ctl.card 0


Previous /etc/asound.conf

pcm.!default {
type hw
card SB
}

ctl.!default {
type hw
card SB
}