title: Add a JavaScript button using Greasemonkey or Tampermonkey?
body: <p>I am fairly new to the world of Greasemonkey and I was wondering how to make a button in JavaScript.</p>
  
  <p>Say I wanted to put a button on YouTube or Google for instance? How would I go about calling it or making it?</p>
  
  <p>I'm very confused and cant find anything on it. Unless is there someway to interact with the HTML of these sites and add them to Greasemonkey scripts?</p>