Just as an FYI, new versions of chrome also sends back the full URL and the hash of any file you download or save. I bumped across this when I was trying to download light table and it din't let me open it. After a bit of research I found file scanning to be the new addition to chrome's malware checks. With all the NSA debacle going on now, I am feeling even more paranoid. I love chrome but I will be switching to Firefox or IE10 soon.