title: Create a Tampermonkey script
body: <p>I want to create a Tampermoney script that writes something in an input field, if it finds a string on the page. E.g:</p>
  
  <p>If the page contain the string <code>"life is"</code>, the script should automatically append <code>"good"</code>.</p>
  
  <p>(I want to make this with word detection, so the string "life is", will appear on the page after that the page was accessed)</p>