You may find more help here: Assign shortcuts to search engines. In Firefox settings>Search>Search Suggestions, uncheck Show search suggestions in address bar results and ahead of browsing history.The simplest method to remove this parameter is to use another searchengine than Google. Firefox for Android lets you add, remove and change your default search engine. Learn to manage your search engines with just a few taps. This article explains what information is stored in your Firefox history and gives you step-by-step ways to clear all or part of it. So basically, just add a space to the start. 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). Manage third-party cookie settings for test group users.