How do I use Firefox?

I recently downloaded and installed Firefox.  After using it for a while, I decided it's okay.  However, is there some way to change Quickkeys and stuff?  I keep hitting "S" for "Save As" when I right-click an image, since I'm used to IE, and it keeps wanting to set the image as my Desktop Wallpaper.  So, how do I change key configuration?

Also, I found the place to empty out the Download window auotmatically, but is there some way to CLOSE the Download window automatically?

Just install Opera. It can do what you want, and is superior in many other ways.