<!--
In the react devtools window, clicking the troubleshooting instructions link opens 2 tabs of the troubleshooting page, instead of once
-->

React version: Devtools 4.8.2
Firefox version: 79.0 64-bit

## Steps To Reproduce

1. Go to a non-react page
2. Open the devtools box
3. Click troubleshooting instructions

## The current behavior
Opens 2 tabs of the github page
## The expected behavior
Should open 1 tab of the github page
'use strict';
document.addEventListener('DOMContentLoaded', function() {
  
  const links = document.getElementsByTagName('a');
  for (let i = 0; i < links.length; i++) {
    (function() {
      const ln = links[i];
      const location = ln.href;
      ln.onclick = function() {
        chrome.tabs.create({active: true, url: location});
      };
    })();
  }
  
  document.body.style.opacity = 0;
  document.body.style.transition = 'opacity ease-out .4s';
  requestAnimationFrame(function() {
    document.body.style.opacity = 1;
  });
});