Webpage Extension Modification Tester
This Repl tests whether this given webpage's HTML has been modified by a 3rd party extension. I did this by comparing the page's HTML to the HTML of the Repl Code. Since it was too hard to escape all the HTML, I used an XHR request to get the original HTML.
I'd also like to share another one of my repls:
I used CSS and JS to make the cursor change wildly whenever you move it. Have fun.