This is the browser button for AutoPager. You need AutoPager For Chrome version 0.6.0.23 or later.
To make this button optional, we put this in this helper extension all by itself, to be installed along with AutoPager.

Change the id if you install a different version of AutoPager.

To remove the button, right click it and choose Disable.

  Install it here. Or Install locally if you aren't able to access the previous url.

You can ask questions or helps at our forum: http://www.teesoft.info/phpbb/viewforum.php?f=3.