The new Vivaldi browser released in 2016 by Opera co-founder Jon von Tetzchner was released yesterday with a very interesting change.
Like most programs tourς, ο Vivaldi προσφέρει μια λειτουργία ιδιωτικής περιήγησης που προσφέρει ένα επιπλέον επίπεδο ιδιωτικότητας, καθώς δεν καταγράφει τους ιστότοπους που επισκέπτεστε και δεν αποθηκεύει cookies ή προσωρινά αρχεία. 
However, Vivaldi with the new version also changed the default machine αναζήτησης και χρησιμοποιεί την DuckDuckGo στα παράθυρα ιδιωτικής περιήγησης, ανεξάρτητα από το ποια είναι η προεπιλεγμένη μηχανή αναζήτησης σας στη λειτουργία της κανονικής περιήγησης.
DuckDuckGo was founded by 2008 and is a counterbalance to Google's search engine, which does not track its users on the web, serving the same results to all users.
Apple has added DuckDuckGo as choice search on 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.
