My first recommendation for this wonderful project:
In Safari a user can prevent downloads from happening until that person decides to push "Allow" downloads from this website. I'd like to see this similar behavior inside of Orion! I think the big reason to do so is it prevents accidental downloads of say malicious software and also allows you to have a little more control of what is downloaded on the web. I also think this is another great security tip to prevent any websites from just downloading anything.