By clicking on the Speaker Icon in the Listen column your browser will open a new tab and play that sermon. If you click on another Speaker Icon that same browser tab previously opened will play that new sermon abandoning the previous.
If you want to save the file to your hard-drive, then click on the File Download Icon in the Download column. Firefox, Chrome, Opera, and MS Edge all now support this funtionality!
Some sermons are available as videos! Clicking on the will open a new tab with that video.