Hi YanksFan! Let's see if we can get your audio working the way it should. I'm not sure it's a FF setting. It may be a Windows 11 Setting, but we'll check both. :) 1. Load or open Firefox. Next click on Settings. Under General, the first setting, scroll way, way down the page to "BROWSING" and make sure there's a checkmark in "Control media via keyboard, headset, or virtual interface". You might even go ahead and toggle that on and off a couple of times. If there already was a checkmark there, that's okay, too! If there wasn't and you added one, might not hurt to reboot your computer before doing the next step. :) 2. Windows settings are different in Win 10 (which I have) and Win 11 (which you have) so these steps may not be exact for you. I hope you can get close enough! Okay First, LEFT-click the Windows logo in your Tray, >then click on SETTINGS.>then click on SYSTEM.>Next click on SOUND. The first item under SOUND is OUTPUT. Look that over and make sure at "Choose Your Output Device" what it says is the kind of output you have, like speakers, headphones, whatever. Below that should be a master Volume Control slider. Probably not the problem at all but just know you can change the master volume there. Somewhere on the page it should have a button that says "Troubleshoot". If you find that in your Win 11, run that troubleshooter. My Win 10 also has a link to "fix the issue". If yours does, click that. Reboot your computer again. Try something like a YouTube video to see if the sound is back. Make sure your YouTube volume is high enough. Good luck. Let us know please. :) Be Kind. It Matters.