Browsers don't usually make a lot of noise
Please provide a lot more background info - what equipment (make, model, etc) are you using, and what is the output of lsmod? Does sound work for any other apps, like playing CD's? Has sound ever worked in the past?
If this is a new installation and sound has never worked, then it's possible that either you need to load the module your sound card needs, or possibly you just need to go through a couple of initial configuration exercises (such as alsaconf and alsamixer). If sound used to work but now doesn't, it could be a simple matter like the speaker cable not being in the right jack in the soundcard, or that the sound volumes are all turned down to zero.
The more info you can provide, the better the chances that someone will be able to offer useful advice. Good luck with it ChemicalBurn -- J.W.