Chrome has had custom search engine keywords since day one (yes, I actually went to locate a day-one article on this feature[1]). Not sure why every time this topic comes up someone has to mention it as if it’s some sort of Firefox secret sauce, complete with weird replies like if you are “stuck on Chromium” you can emulate this with a pointless round trip to DuckDuckGo.
[1] https://searchengineland.com/searching-with-google-chrome-om...