Go to settings > Search > And remove google from the search engine alternatives. Don't just uncheck; Purge it. PURGE!How to Remove "Search With" from FireFox Address Bar (v58). In Firefox settings>Search>Search Suggestions, uncheck Show search suggestions in address bar results and ahead of browsing history. If you wish to remove the autofill background only in your Firefox browser, set layout.css.autofill. Background to false in about:config. In the location bar, type about:config and hit Enter. In the filter at the top, type: keyword. 6 Easy Steps to Remove Bing from Mozilla Firefox: 1. Click on the "inverted triangle" located to the right of the orange Bing icon. 2.