[lsmod]

Visit "about:preferences#search" and then uncheck every search engine under "One-Click Search Engines" list.

[konart]

Okay, I'm stupid. For some reason I never even tried to uncked _all_ of them. Always been keeping Google, thinking it should be there for search in the url bar to work.

Thanks!

[lsmod]

Use DuckDuckGo as the default search engine, then you can use the "Bang"[0] notation to search using other services.

[0]https://duckduckgo.com/bang

[zaarn]

You can also go into the Customization Menu and remove the Search Bar there while keeping the search engines.