Some extensions will place themselves on the toolbar. Others, you must place.

Type about:customizing<enter> in the address bar. In the new window, look for the icon. When you find it, hold down the left button on it, and move it to where you want it to be. You can move any of the icons you want from here, but some icons are locked in place.

Thanks very much for your response Fred a great help.

Glad to help. Safe Surfing.