You can fill in the whole form with one action if you
use <TAB> in "Text to type" input field. It acts as you
actually pressed TAB button on keyboard. You can even
use <RETURN> at the end of form filling to submit form
data - it acts as if you pressed ENTER button on keyboard
to submit the whole form data.
Open developer tools in your own browser and look at the network tab. Click on the requests and click Block Request then refresh (Right click refresh button and reload without cache)
Keep blocking images and scripts until the website stops working
Take that list of blocked stuff and put it in your script using Request Mask Deny
