• Firefox offers better privacy and security than Chrome, with upcoming support for 200 new add-ons. • While Chrome dominates, Firefox gains ground with user-friendly browsing experience and open-source model. • Mozilla’s focus on user privacy and transparency challenges Google’s ad-centric approach, making Firefox a viable alternative.
This is the way. The dude in the comment above the one I am replying to described a different way where you have to change the config, which would be neccesary to do on every new installation. Via the bookmarks/shortcuts method you will have the BANG Search on every new installation just by importing your bookmarks - or if you use an firefox account with synchronisation you will already have it with your login.
Be advised that duckduckgo has already some predefined BANG Searches, that you can use without having to change anything. Just type in the search bar: