title: not able to install chrome extension by DnD after v30
body: <p>In the back good old days, we can install chrome extension offline by drag and drop the crx file into chrome://extensions panel, but that will fail with the latest chrome now, saying "this can only be added from the chrome web store", I'm running 30.0.1599.101, Windows-7 64-bit</p>
  
  <p>Is there any alternative way to offline install chrome extension ?</p>
  
  <p><strong>Update</strong>: this is not duplicate question of <a href="https://stackoverflow.com/questions/12049366/re-enabling-extension-installs">Re-enabling extension installs</a></p>
  
  <p>please notice the difference of address bar in below snaps</p>
  
  <ol>
  <li>DnD is not working anyway. We can DnD the crx file into Chrome, and Chrome knows it is one extension. <img src="https://i.stack.imgur.com/On4Ht.png" alt="Install Chrome Extension by DnD is not working. Chorme 30.0.1599.101 (Official Build 227552) m, Windows OS"></li>
  <li>--enable-easy-off-store-extension-install is not working either. I was asked to confirm install the extension, and I said Yes, please do it, but failed with the indicator progress bar disappears<img src="https://i.stack.imgur.com/0AiMK.png" alt="enter image description here"></li>
  </ol>