qutebrowser (pronounced “cute browser” /kjuːtbraʊzər/) is a Chromium-based web browser for Linux, Windows, and macOS operating systems with Vim-style key bindings and a minimal GUI. It is keyboard-driven and is inspired by similar software such as Vimperator and dwb. It uses DuckDuckGo as the default search engine. qutebrowser is included in the native repositories of Linux distributions such as Fedora and Arch Linux. qutebrowser is developed by Florian Bruhin, for which he received a CH Open Source award in 2016.
The default search engine is Duckduckgo, whose business model is advertising (https://help.duckduckgo.com/duckduckgo-help-pages/company/advertising-and-affiliates). Apart from that, the browser does not seem to include any other forms of trade.