Go to settings > Search > And remove google from the search engine alternatives. Don't just uncheck; Purge it. PURGE!In Firefox settings>Search>Search Suggestions, uncheck Show search suggestions in address bar results and ahead of browsing history. In about:config, toggle the following preference to false to disable searching from the address bar unless you click one of the search engine options. How to Remove "Search With" from FireFox Address Bar (v58). Simply use the arrow keys to rollover the suggestion you no longer want to see, and hit Shift Del to delete it. The Search panel in Firefox Settings lets you customize your search options. Just start typing in the address bar. Suggestions from your browsing history, bookmarks, and tabs will be listed, underneath what you've typed. On the Settings page, scroll to Search Shortcuts and highlight the search engine you want to delete.