I don't really know if you're for profit or not, and I'm not really worried about it. Either way, you've done good things for privacy, the internet, and been on the "user"/people's side. (reminds me of Sun)
I came to your site thinking I would buy a T-shirt, to help advertise you, but don't see one. I know, I can, probably, find a third party, but I would have preferred all the profits to go to you, and I could help raise awareness.
I would think this would be a no-brainer. Firefox/Mozilla T-shirts. You have fans!