Right click on the top of the Firefox toolbars and select "customiz" from that menu. Click the Customize option and a pop-up screen jumps out – do NOT select anything on it, and do NOT close it. With the screen open, in the background now you can now move the toolbars wherever you want. It works as simple drag and drop. When you are done, simply click “Done” on the pop-up screen and your Firefox toolbars are locked in the new position. If inspite of all efforts you still cannot get toolbars in their original position or want to start fresh, then try “Restore Default Set” option on the pop up screen and you will get all sorted to the original configuration. But remember a lot of your alterations, buttons and settings will need to be set again.