The web browser of PureOS. Based on Iceweasel, but with more consideration to privacy and safety.
PureBrowser takes Debian's Iceweasel and includes a number of the changes made for GNU's IceCat, along with some extensions that we like - privacybadger, https-everywhere, and html5-video-everywhere.
DuckDuckGo's search page is the default, as well as the homepage. Other search engines included are ixquick, startpage, creative commons, wikipedia, and disconnect.me.