Bang by Eyk Rehbein

Shortcuts that quickly take you to search results on other sites. Example: !a shoes will take you to https://amazon.com/s?k=shoes
Bang is an open-source shortcut parser for your URL Bar. To see more information, visit the project's GitHub Repository https://github.com/eykrehbein/bang

This is a project that was inspired by DuckDuckGo's Bang Feature. If you want the experience of this extension, but at the same time a private search history, I'd recommend to use DuckDuckGo as your primary search engine. (By the way, if you are an Employee at DuckDuckGo and disagree with this open-source project, please let me know)