In my PureOS install the default search engine in PureBrowser is Google, which is weird because https://pureos.net/ advertises that we ship Duckduckgo by default.

"PureOS comes with the best free/libre privacy and security software and apps for privacy “out of the box” — including the Tor browser, the Duck Duck Go search engine and HTTPS: Everywhere bundled into our official web browser, PureBrowser."