olemus
lisafunktsioonidega (otsing, arvutused jm) aadressiriba veebibrauseri liideses

Wiktionary:
(Internet, graphical user interface) an enhanced address bar in a web browser that can also accept certain text commands

ülevaateid
https://www.computerhope.com/jargon/o/omnibox.htm

https://developer.mozilla.org/en-US/Add-ons/WebExtensions/API/omnibox