firefox-logo Over the past two months Firefox had been troubling me (and some other users too). While playing YouTube Videos I could see the motion but cannot hear the sound. Frustratingly, I had to open each video in Google Chrome. I checked out lots of forums over the net to find a solution but nothing worked. Some advised to upgrade the flash version while others suggested downgrading but result was nil.

Things got worse even more. My flash got corrupted in this upgrading and downgrading. Finally I have found the solution of what was causing the problem. Here are a few steps to take to correct your sound problem in Firefox:

1. Windows Vista Sound Mixer:

firefox-sound-windows-vista-mixer

This is the main culprit for many of the users. Actually Windows Vista Sound Mixer has been left unnoticed by many Vista users. It features a separate tab of volume control for each application trying to play sound. The Firefox gets mute over there and with my conclusion its some of the FLV converters which is causing this mute. My Firefox sound was muted after I installed some FLV converters. You can un-mute the sound by following the below procedure:

  1. Click the sound icon in taskbar. (Near to the clock at the right bottom).
  2. Open Mixer.
  3. Now open any page in Firefox which plays some sound. A YouTube video will do the job. Make sure it is playing.
  4. Now watch in Windows Mixer a separate tab with Firefox logo will appear.
  5. If it is on mute, un-mute it.

Don’t blame Vista for this. Its either your manual effort or some other software is the culprit behind it. This should work for most of you, but if still you can’t hear anything follow the next step.

2. Upgrade your flash:

Try upgrading your flash. It can be downloaded from the Adobe’s Website here. You must be thinking other forums and websites suggest to downgrade the version but why are we saying to upgrade it. The answer is simple would you like a buggy version of a software or an improved and advanced version. The decision is yours.

3. Firefox Plugin’s:

Make sure you have appropriate plugins for your media. You can find them here.

The problem should be solved by now. But if it doesn’t, then you should create a brand new Firefox Profile and then check if the sound could be heard in it or not. If it does then some of your Firefox plug-in is interrupting your Firefox sound.