Page Scroller is a firefox add-on that allows most of the websites to automatically scroll down. It is developed using javascript and it is embedded on the website’s source code.

You can find it here

Technical Information

This plugin is built to function on most of the websites. However, since it is embedded on the html source code collisions had to be avoided. So all functions were enclosed in a javascript method, using an object oriented approach

Furthermore, this το add-on adds a piece of HTML code on the website that had to be programmed in the most efficient way to avoid delaying the total page loading. That is why, javascript functions that manipulate the DOM were used, that are proven to have the fastest execution time.

Finally, since every website is different, in order to prevent the plugin from hiding any of the content it can be dragged and dropped anywhere on the page