Gabriel Weinberg’s DuckDuckGo search engine offers some innovative privacy settings. I played with them at some point, removing query information from DuckDuckGo URLs by switching to POST requests, but later decided that it was just too convenient to have easy access to old queries through the browser history. Mr Weinberg’s latest post on search leakage got me to reconsider:

One site having one of my search terms is irrelevant. That may generally be the case, but unfortunately, tens of millions of sites run ads from just a handful of ad networks. Those ad networks can aggregate your search terms and piece together a large percentage of your search history.