> Another way to prevent search leakage is by using something called a POST request, which has the effect of not showing your search in your browser, and, as a consequence, does not send it to other sites. You can turn on POST requests on our settings page, but it has its own issues. POST requests usually break browser back buttons, and they make it impossible for you to easily share your search by copying and pasting it out of your Web browser's address bar.
This is from their page on privacy ( https://duckduckgo.com/privacy ):
> Another way to prevent search leakage is by using something called a POST request, which has the effect of not showing your search in your browser, and, as a consequence, does not send it to other sites. You can turn on POST requests on our settings page, but it has its own issues. POST requests usually break browser back buttons, and they make it impossible for you to easily share your search by copying and pasting it out of your Web browser's address bar.