Maybe it's from search suggestion API? Anyway, I turn that off as soon as I create a new browser profile, along with the safe browsing list and automatic search

Maybe it's from search suggestion API? Anyway, I turn that off as soon as I create a new browser profile, along with the safe browsing list and automatic search when I type unrecognized URL. When I want to search I use search input of the browser. (ctrl+k) URL bar is for URLs only.