In Firefox the term is Omnibar, or at least used to be. I'm on Mobile where the option doesn't exist, but search settings for that.
LibreWolf
Welcome to the official community for LibreWolf.
LibreWolf is designed to increase protection against tracking and fingerprinting techniques, while also including a few security improvements. LibreWolf also aims to remove all the telemetry, data collection and annoyances, as well as disabling anti-freedom features like DRM. If you have any question please visit our FAQ first: https://librewolf.net/docs/faq/
To learn more or to download the browser visit the website: https://librewolf.net/
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I remember something like this as well, but I suspect it changed with the last release or two. Currently, there is no "omni" in about:config.
I thing you be good with:
keyword.enabled = false
Thanks a lot! This worked ✅