title: Replace HTML text displaying on webpage using Chrome without installing a chrome extension
body: <p>I am trying to find a way to replace certain text on the webpage without the use of chrome extensions.</p>
  
  <p>For example, I want the text 'dogs' to replace with 'doggos' each time the web page detects the word dogs. Is it possible to do this without the use of Chrome Extensions? How can I write such a script and can this run in the backgroun?</p>
  
  <p>Thanks all!</p>