As privacy is becoming a mainstream concern in the United States, Vivaldi has partnered with DuckDuckGo to offer their users a more secure Private Browsing experience when using the web browser’s Private Windows (also known as Private Mode). With the latest stable Vivaldi release, DuckDuckGo has become the default search engine for all Private Windows, enabling users to keep their Web searches private. Vivaldi said that their highest priority at the moment is to respect the privacy of their users, and the integration of the DuckDuckGo privacy-aware search engine into their web browser’s Private Windows will definitely boost your private search and browsing experience. Vivaldi’s Private Windows don’t track you, gather private information, and won’t store visited sites, cookies and temporary files.