Hello,
The browser scrolling feature uses "auto-scroll" to scroll the page.
This addon in the default settings emulates "scrollbar dragging" (it's same as clicking the scrollbar and dragging it up-down).
But what's more, there is a lot of settings in the Options page that can further improve or change scrolling (like the Momentum).
I should probably make a new video that demonstrates these features :).
Have a nice week :)
Best Regards,
Juraj Mäsiar