How to website console script to activate buttons, fill in text boxes etc?

Maybe this question is quite difficult. I need to visualize my quaternion data set. I came across this website: https://quaternions.online/ . There is a check box called Animation and when you click that, then you see a cool Animation. I thought somehow must it be possible to automaticly type in my quaternion data in these text field and click automatically Apply Rotation in a certain speed, so it gives me an animation from my own data. What is the easyest/fastest way to do this? I thought maybe its also possible with the browser integrated console, but I dont know how.

I think the best way is when I make 4 text files (w-Data, x-Data, y-Data, z-Data) and somehow I can type in the path to these text files and a script automatically copy and paste these datas in the text box and click Apply Rotation.

I hope anyone can help me. Thanks.