Firefox: no audio

I my Firefox when I play any type of video (youtube or video of different origin) I see images but no audio at all. Chromium works normally, playing same video with audio.
Till few days ago Firefox don’t even play video, after adding Packman repos I see images in video but no audio.

Firefox 102.5.0esr

What do you mean exact by “adding Packman repos”.
Adding a repository is just that: making it available to install package from it. But when you do not install packages from it, then nothing changes.

So, did you do the Vendor change?

You’re right, I’ve not been clear.

So, did you do the Vendor change?

Yes, I did and after installed several package. After that Firefox started playing video but images only no audio.

What does the following command report?

systemctl --user list-unit-files | grep -iE "pulse|pipe"

With firefox playing media, show the output of

wpctl status

Check the application audio levels with ‘pavucontrol’, or if using KDE you can do the same via it’s audio widget.

~> systemctl --user list-unit-files | grep -iE "pulse|pipe" 
**pipe**wire-session-manager.service                                                       alias     - 
**pipe**wire.service                                                                       disabled  disabled 
**pulse**audio-x11.service                                                                 static    - 
**pulse**audio.service                                                                     disabled  disabled 
**pipe**wire.socket                                                                        enabled   enabled 
**pulse**audio.socket                                                                      enabled   enabled  

When play video:

~> wpctl status 
PipeWire 'pipewire-0' [0.3.49, giorgio@localhost.localdomain, cookie:2803089533] 
 └─ Clients: 
        31. xdg-desktop-portal                  [0.3.49, giorgio@localhost.localdomain, pid:2015] 
        32. WirePlumber                         [0.3.49, giorgio@localhost.localdomain, pid:2061] 
        33. WirePlumber [export]                [0.3.49, giorgio@localhost.localdomain, pid:2061] 
        40. wpctl                               [0.3.49, giorgio@localhost.localdomain, pid:4681] 

Audio 
 ├─ Devices: 
 │   
 ├─ Sinks: 
 │   
 ├─ Sink endpoints: 
 │   
 ├─ Sources: 
 │   
 ├─ Source endpoints: 
 │   
 └─ Streams: 

Video 
 ├─ Devices: 
 │      36. HP Truevision HD                    [v4l2] 
 │      37. HP Truevision HD                    [v4l2] 
 │   
 ├─ Sinks: 
 │   
 ├─ Sink endpoints: 
 │   
 ├─ Sources: 
 │  *   38. HP Truevision HD                    
 │   
 ├─ Source endpoints: 
 │   
 └─ Streams: 

Settings 
 └─ Default Configured Node Names:

I note that you have both pulseaudio and pipwire active. While there may be no issue with that, I expected to see pipewire-pulse.socket active, but you obviously don’t have pipewire-pulseaudio installed. For reference, I have

~> systemctl --user list-unit-files | grep -iE "pulse|pipe"  
pipewire-pulse.service                                                disabled  disabled 
pipewire-session-manager.service                                      alias     - 
pipewire.service                                                      disabled  disabled 
pipewire-pulse.socket                                                 enabled   enabled 
pipewire.socket                                                       enabled   enabled

When playing a video via firefox, I would expect to see something like…

~> wpctl status                      
PipeWire 'pipewire-0' [0.3.49, dean@linux-4k1z, cookie:1876903823] 
 └─ Clients: 
        31. xdg-desktop-portal                  [0.3.49, dean@linux-4k1z, pid:10447] 
        32. WirePlumber                         [0.3.49, dean@linux-4k1z, pid:10715] 
        33. WirePlumber [export]                [0.3.49, dean@linux-4k1z, pid:10715] 
        48. Plasma PA                           [0.3.49, dean@linux-4k1z, pid:10539] 
        49. pipewire-pulse                      [0.3.49, dean@linux-4k1z, pid:10761] 
        50. Firefox                             [0.3.49, dean@linux-4k1z, pid:12167] 
        51. Firefox                             [0.3.49, dean@linux-4k1z, pid:12167] 
        62. wpctl                               [0.3.49, dean@linux-4k1z, pid:12974]

Problem solved and the solution is simple.

When Firefox is open in panel you’ll find Firefox icon: a red fox in “circle”

When Firefox is playing audio (or video with audio) aloudspeaker is added to Firefox icon

If the loudspeaker has a baraudio is off.
To activate audio right click on icon → deselect “mute”.

I never noticed before this small loudspeaker in Firefox icon, may be is new feature?

I’ve haven’t seen such an icon. I’m using KDE with a Firefox launch icon on the task manager bar. I do note that when media is playing a given tab, an audio symbol is shown, and clicking on that can be used to mute/unmute audio as required. That’s been around for a long time. Perhaps that is what you are describing.