Set 0 interval is good tip for continuous scrolling. but too fast for 0.1 window size (minimum). Please enable 2 decimal input for window size (minimum to be 0.01) or allow interval input in milliseconds.
And it will be good if I can toggle start/stop by touch on screen (I use Android)

Not working on firefox for Android

On Firefox android does not continuously scroll. When you press scroll, it does it once then never again. A shame because there it seems this would be the only auto scroller that has the simple features I want.
Edit: I am using the most up to date version of Firefox available from Google Play, 133.0.3 is listed in the Firefox settings. I set the interval for 10 seconds with a scroll amount of 0.8. I was wanting to read and thought that would be the ideal setting. Is it that I should have set a smaller scroll amount and put the interval as 0?

it's good and i like how it scroll, but it will be better when we (as a user) can custom delay to scroll. keep it up!!!