Change menu and give an opportunity to move the Firefox button.
Warning! This extension doesn't work since Firefox 29. And I don't have plans to update them. I'm sorry.
Tips and tricks
I. How to change position of the Firefox button?
- Install extension.
- Right click an empty space of a toolbar, select "Customize".
- Drag the button to your favorite place.
- Click "Done" in the Customize Toolbar window.
II. You can use middle click to open new tab.