Do you mean on the built-in Firefox Home / new tab page, as soon as you start typing in the search box in the middle of the page, the cursor jumps up to the address bar? There is a preference for this but it does take a bit of work to find it because of the unusual name: (1) In a new tab, type or paste '''about:config''' in the address bar and press Enter/Return. Click the button accepting the risk. (2) In the search box in the page, type or paste '''handoff''' and pause while the list is filtered (3) Double-click the '''browser.newtabpage.activity-stream.improvesearch.handoffToAwesomebar''' preference to switch the value from true to false Success? ''More info on about:config:'' [[Configuration Editor for Firefox]].