No issues here. see screenshots I have external speakers plugged into the headphone jack. I can switch between external and laptop speakers. What model computer are you using?

Edition Windows 11 Pro Insider Preview Version 22H2 Installed on ‎18-‎Jun-‎22 OS build 25140.1000 Experience Windows Feature Experience Pack 1000.25140.1000.0

Try plugging in external speakers and test.

I only have one external headphone, no internal device. That one headphone still works with my entire system except Firefox.

I also double-checked of Firefox was outputting to the wrong device. My screenshot says "default", but I show that is the same device my system is connected to and I still hear my system.

I'll get you more info on the computer later when I'm in front of it, but it's custom built. Windows 11 Pro running on onboard soundboard from MSI Z690 CARBON WIFI motherboard.

Pretty sure the issue is with Firefox, I can't isolate it outside the program. Everything else audio works fine.

Did you get Firefox from MS store or Mozilla?

Firefox from Mozilla. Version 101.0.1 (64-bit). I use the auto-download update tool.

OS is Windows 11 Pro, Version 21H2, Installed on 4/29/2022, OS build 22000.739, Experience Pack 1000.22000.739.0

Just for S&Gs try a different version of Firefox. https://www.mozilla.org/en-US/firefox/all/#product-desktop-release

Actually I just changed Firefox's Output device from default to the actual device (which was set as the default device). I'm surprised to say that now the audio is working. Switch back from the device to Default and the audio still works.

Before doing this, I clicked the Reset button at the bottom of the Volume mixer, although it kept everything at Default and didn't change anything.

Whichever one of these two did the trick, it seems to have knocked the issue loose. I'm starting to think it was a bug in the Volume mixer. Anyway, thanks for your help on this, this has been bugging me for the past week.

HOORAY!!!