What happened to the search bar that used to be to the right of the address bar

Hi ! This could be caused by an extension that is part of a Mozilla experiment. Without even knowing it, you may have volunteered for this Mozilla experiment, called 'Shield studies' Would you please go to : Options => Privacy & Security => under 'Data Collection and Use' : Did you '''un'''check : 'Allow Firefox to install and run studies' or is it checked ? To check if you are enrolled in these studies : Type in the address bar '''about:studies''' Any extensions that you see listed there, you can either disable or remove. For further information see : https://support.mozilla.org/en-US/kb/shield