Webscrape data from table on HTML website and save data to my firebase database

I need a HTML script that runs when I click a button my website. The custom script then needs to connect to another website and pull the data form the table and save data to firebase when the button is clicked. Script needs to be in easy formate and be able to repeated for 10 webpages.

I will provide a simple html website which provides the urls to scrape, has a button to press and firebase db connected already.