No audio for YouTube videos played within Firefox
My wife could not hear audio today when she was viewing
YouTube
videos in the
Firefox browser. She thought the problem occurred after the automatic update
of Windows 10 on her system with the Anniversary Update. The YouTube audio
setting was not muted and was turned up to a level where I should have heard
sound and I found that I could hear audio for a music file outside of Firefox
and I could hear audio for the YouTube video she was trying to view within the
Microsoft Edge web browser on the system. And when I went to the
CNN website, I was able
to listen to the audio associated with a news video on the site.
The Browserspy website's
Adobe Flash Information page
showed the version of Flash installed on her system was 23.0.0.162.
Adobe's Flash Player webpage
showed the latest version, 23.0.0.162, was installed. I hit the Alt
and H keys to bring up the Firefox help menu, then chose
About Firefox, which shows the version of Firefox. The version of Firefox
on the system was 49.0.1 and beneath the version was the message "Firefox
is up to date."
I typed sndvol in a command prompt window to open the
Volume Mixer. You can also get to the Volume Mixer on a Windows 10
system by typng sndvol in the
Cortana "Ask me anything window.
The Volume Mixer showed a low olume for Mozilla Firefox, so I increased
the volume by dragging the slider bar for Mozilaa Firefox upwards.
I could see the green bar in the Mozilla Firefox section of the
Voume Mixer moving up and down as the YouTube video played in Firefox,
though I couldn't hear any sound.
I muted the volume in Firefox by clicking on the speaker icon in the
Mozilla Firefox section of the Volume Mixer.
When I clicked on the speaker icon again in the Volume Mixer to unmute it,
I could then hear sound from the YouTube video play through the speakers.
