I though this is not technically possible due to DDG privacy policy.
posted by TV 4 years and 27 days ago Link

Actually the latest Firefox search plugin should have auto-complete built into it (from the Android app). Unfortunately, there is no way to update old search plugins, but if you deinstall it and re-install it then it should work.

Our suggestions are non-personal and are not based on any personal search history (which we don't store in accordance with our privacy policy).
posted by yegg Staff4 years and 27 days ago Link
Thanks for explanation, sounds like exiting new addon for DuckDuckGo !
posted by TV 4 years and 26 days ago Link