Rated 3 out of 5 stars

Works well on every website I've tried except websites that have sidebars. (First one I found was fmylife.com.) The sidebars on websites are nearly impossible to access, because whenever you scroll down to click on them, AutoPager automatically loads the next page and moves the sidebar out of reach again.

For sites without sidebars, I'd give AutoPager 5 stars. For sites with sidebars, 2 stars.

This review is for a previous version of the add-on (0.5.2.2). 

The sidebars issues can be easily fixed by modify the rules for the page.
I have updated the rule for fmylife.com.
You can use Tools->AutoPager->Update Setting Online to get it.