title: Chrome dev tool show file name and line number instead of main.js
body: <p>when I console log something,</p>
  <p>I was pretty sure I got file name and line number before.</p>
  <p>but now I can only see main.js and a number like this:</p>
  <p><a href="https://i.stack.imgur.com/AH2GV.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/AH2GV.png" alt="enter image description here" /></a></p>
  <p>Does anyone know how to change it back? Thanks.</p>