Ubuntu youtube no sound in firefox

I was continuously facing problem with sound while playing youtube using firefox. The youtube inturn uses gstreamer library to render the sound.

Finally got sound working after installing restricted packages!

Run "sudo apt-get install ubuntu-restricted-extras"

Paly and check your youtube for sound.

To Reset Firefox MasterPassword

Firefox:

Enter "chrome://pippki/content/resetpassword.xul" in the Location Bar, press Enter, then click "Reset"