DuckDuckGo became quite useful recently.
Currently you cannot set it for the browser as default (in the settings).
For the records:
- You can set it up via
devel-su curl https://duckduckgo.com/opensearc h.xml -o /usr/lib64/mozembedlite/chrome/embedlite/content/duckduckgo.xml
at the C2, cf. with [1] - Or browse to DuckDuckGo once.
Now you find an option in the browser’s settings.