FxButton

Change menu and give an opportunity to move the Abrowser button.

NOTE: This extension doesn't work with Australis UI. Please remove them from your add-ons list.

How to change position of the Abrowser 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.

Other little tips:

-You can use middle click to open new tab.