AutoVort

AutoVort allows user to enter a list of URLs. The extension then visits each URL and then scroll down a set amount of page on each of them. Every aspect of scrolling size, timing between pages, sites etc. can be precisely controlled.

AutoVort scrolls intelligently, very customizable on any page. Intelligently because it waits for new content to be loaded (infinite scroller sites) before decides it's the end of the page.

If you want some documentation: https://www.vortimo.com/fulldoc/#autovort