Description from extension meta
Similar to Firefox bookmark keywords, it also supports DuckDuckGo !bangs.
Image from store
Description from store
Direct Keywords is a Chrome Omnibox keyword engine supporting three types of direct-entry keywords (no prefix needed):
1. Bookmark Keywords:
Functioning like Firefox bookmark keywords. For example, a bookmark tagged !xxx (abookmark 0.46+ format) can be accessed by typing xxx in the address bar.
https://www.abookmark.org/docs/kw
2. DuckDuckGo !bang:
Example: !w xxx
3. Trailing DuckDuckGo !bang:
Example: xxx !w
https://duckduckgo.com/bangs
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Notes:
Bookmarklets are not supported.
Simply type the keyword into the address bar and press Enter.