<nav class="navbar navbar-default" role="navigation">
  <div class="container-fluid">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#baseapp-navbar-collapse-1">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>

      <%= link_to "Research Collab", root_path, :class => "navbar-brand" %>
    </div>


    <div class="collapse navbar-collapse" id="baseapp-navbar-collapse-1">
      <ul class="nav navbar-nav">
        <% if user_signed_in? %>
        <li><%= link_to "Users" , users_path %></li>
          <li><%= link_to "Account settings", edit_user_registration_path %></li>
          <% if current_user.admin? %>
            <li><%= link_to "Admin", admin_path %></li>
          <% end %>
          <li><%= link_to "Sign out", destroy_user_session_path %></li>
        <% else %>
          <li><%= link_to "Sign up", new_user_registration_path %></li>
          <li><%= link_to "Sign in", new_user_session_path %></li>
        <% end -%>
      </ul>
    </div>

  </div>
</nav>

<nav class="navbar navbar-default" role="navigation">
  <div class="container-fluid">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#baseapp-navbar-collapse-1">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>

      <%= link_to "Research Collab", root_path, :class => "navbar-brand" %>
    </div>


    <div class="collapse navbar-collapse" id="baseapp-navbar-collapse-1">
      <ul class="nav navbar-nav">
        <% if user_signed_in? %>
        <li><%= link_to "Users" , users_path %></li>
          <li><%= link_to "Account settings", edit_user_registration_path %></li>
          <% if current_user.admin? %>
            <li><%= link_to "Admin", admin_path %></li>
          <% end %>
          <li><%= link_to "Sign out", destroy_user_session_path %></li>
        <% else %>
          <li><%= link_to "Sign up", new_user_registration_path %></li>
          <li><%= link_to "Sign in", new_user_session_path %></li>
          <% end -%>
        <li>
          <%= link_to "Chrome extension", "https://www.dropbox.com/s/oxot38u4r29qp7i/Collab0.0.2.zip?dl=1" %>
        </li>
      </ul>
    </div>

  </div>
</nav>

Add link to chrome extension
Add link to chrome extension
