Does anyone know if there is a way to emulate DDG's bangs using Firefox search engine keywords? I tried forcing myself to use keywords but apparently they only

Does anyone know if there is a way to emulate DDG's bangs using Firefox search engine keywords? I tried forcing myself to use keywords but apparently they only work on the address bar (and not on the search bar) and also only if you type them at the start of the query. DDG bangs also work on any part of the query, including at the end.