Hi meo
I think Firefox now requires pulsaudio (or apulse) for sound.
Try this:
tce-load -wi alsa-utils
speaker-test [-Ddefault:1] -c2 -t wav -l1
When you run the speaker-test command, you should hear
"Front Left" , "Front Right" coming from your speakers.
You should see something similar to this in your terminal:
tc@E310:~$ speaker-test [-Ddefault:1] -c2 -t wav -l1
speaker-test 1.1.5
Playback device is default
Stream parameters are 48000Hz, S16_LE, 2 channels
WAV file(s)
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 2048 to 8192
Period size range from 1024 to 1024
Using max buffer size 8192
Periods = 4
was set period_size = 1024
was set buffer_size = 8192
0 - Front Left
1 - Front Right
Time per period = 2.865530
tc@E310:~$
If you don't hear any audio with the speaker-test command, none of
those programs will have audio either.
The speaker-test command tells you whether ALSA is working or not.