Comment: I wish more computer experts could chime in.

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In reply to comment: They don't appear to set any (see in situ)

I wish more computer experts could chime in.

Startpage allows you to use them as a proxy. After you view the list of hits from your query you can click on the proxy link to view each search hit. That would allow you view the website from the startpage results anonymously.

So both cocoon and startpage claim to give you that anonymity. Startpage is more indirect as you have to surf the web via startpage results by specifically clicking on the proxy links. Cocoon would let you type in anything in the URL so there's more convenience.

I really want to find an expert who could share his insight about malware protection via proxies.

I know recording user's web activity also costs money. Startpage is low budget so they can't even afford to track you if they wanted to; though they have said that's not their goal. With Cocoon, I have no idea what they could be doing.