For the search use case, I use Firefox search keywords [1]. It avoids a useless redirection through duckduckgo ; I use duckduckgo bangs when I don't have a keyword configured.

You can even add search keywords by right clicking on a search field -> "Add a keyword for this search". It works on intranets and internal knowledge bases too.

[1] https://support.mozilla.org/en-US/kb/how-search-from-address...