It would be interesting when starting firefox for the first time, to have an initial configuration to choose the default search engine (duckdubckgo, google, bing, among others) and that this option is very visible on the screen.
Although this would be a handy feature. I am not sure if they would be able to do this, as I believe Mozilla gets a large amount of its funding by Google paying them to have Google as Firefox's default search engine by default.