title: ReactJS chrome extension installed but not showing up
body: <p>Anyone know why the ReactJS Chrome browser extension isn't showing for mein dev tools? It's installed, at one point it was working.</p>
  
  <p>I'm using chrome Version 39.0.2171.65 (64-bit) on Mac OS X v 10.7.5</p>
  
  <p>I read the reviews on this extension, some people said need to expose React as a global. I'm using React NPM with:
  <code>var React = require('react');</code></p>