On: DuckDuckGo Searches Are Not Anonymous

There are no accounts and these settings can be set without cookies as well.

Furthermore, the setting cookies are simple transparent cookies (f=-1 to turn off favicons), they are not tracking cookies. They are only used when you set the preference and then only contain your preference itself.

How do you do it without cookies? Changing the settings for each search?

You hardwire a specific URL query string into your browser search bar. Here are the params: http://duckduckgo.com/params.html