Use custom DuckDuckGo-like bangs directly from the address bar
Demo video: https://youtu.be/IXP7RVFMJk4.
See the GitHub page (https://github.com/psidex/CustomBangSearch) for more info, including how to use it and what search engines are supported.
Icon created by apien on Flaticon - https://www.flaticon.com/free-icon/exclamation-mark_4194667.