The new Vivaldi browser released by 2016 by co-founder Jon Jon Tetzchner was released yesterday with a very interesting change.
Like most programs tours, Vivaldi offers a mode private browsing that offers an extra level of privacy as it does not record the websites you visit and does not store cookies or temporary files. 
However, Vivaldi with the new version has also changed the default search engine and uses DuckDuckGo in private browsing windows, no matter what your default search engine is in normal browsing mode.
Founded in 2008, DuckDuckGo is an alternative to Google's search engine that doesn't track its users across the web, serving up the same Results to all users.
Apple has added DuckDuckGo as a search option to Safari since 2014, while the Tor browser has used it by default since 2016.
In most of the major browsers, such as Firefox and Chrome, the default search engine in incognito mode is the same as you use in normal browsing.
So the initiative of Vivaldi to bring her DuckDuckGo as the default search engine in private mode can be considered pioneering.
"We believe that privacy is a fundamental right and that users should not be monitored online," said von Tetzchner, who is also the founder and CEO of Vivaldi.
