Hi, this is a great script. Many thanks.
But I find it inconvenient that the script is enabled again after you disable it and then reload the page. It would be good if it remembered the state on other pages too (globally).
Also, why not add a big button or panel at the bottom which would load the next page with the default state being off. It may be not a big deal, but that would give a feeling of more control of what is happening.

It is possible to change the default to disabled, i.e. AutoPagerize is globally disabled, you need to enable it on the page you want to use it on.

(You have to change line 26 var AUTO_START = true to var AUTO_START = false)

It's not really an option to change the script's source every time you want to switch between globally on or globally off though.

But changing the default to off helps IMHO a lot to feel more to be in control of what's happening.