By design, Firefox is pretty easy to customize as far as the toolbars on the top go. You just have to right click on some empty space up there, then choose “Customize”. From there you can drag things off the Firefox toolbars or add them. Two options are not so easily edited though. That would be the “Go” button and the magnifying glass.
To remove these two, you will need to edit your UserChrome.css file and add [...]