Thomas Claburn wrote in The Register this week about security research done by Zach Edwards into the DuckDuckGo browsers (available on most platforms near you, including my Android phone's default). DDG blocks third-party cookies but due to a contractual agreement for Bing search data, allows Microsoft's tracking scripts to run on third-party websites.

While the tracking code is not included on the DuckDuckGo search results - a separate product offered by the company to provide an alternative to Google Search - the multi-platform browser does not block the tracking scripts from loading. DDG's browser is pitched as a more-private alternative