If you have more than one camera or microphone connected to your computer - like a built-in webcam, an external webcam, Bluetooth earbuds, or a USB mic - your device might pick the wrong one by default.
Windows + S
and type Sound Settings
→ open itWindows + S
, type Device Manager
→ open itSystem Settings
→ SoundFirefox may also prompt you when the page loads — use the popup to choose the correct mic and camera.
Issue | How to Fix |
---|---|
Wrong device used | Go to browser settings and manually select the correct one |
Audio not working | Unplug other mics or headsets you’re not using |
Camera not showing | Close other apps using the camera (Zoom, Skype, Teams) |
Still picking the wrong device | Restart your browser after setting the correct mic/camera |
You can also restart your computer after disconnecting unused devices to make sure only the right ones are active.