title: Firebug is not working on Mozilla version 52
body: <p>Today i have installed a new version(52) of firefox in machine and add the extension firebug .but it not showing in toolbar. i have restarted several times still no luck and then again i have installed ,intstallation gets success,not showing in toolbar.</p>
  
  <p>Again I have customize and enable the firebug but when I clicked it's not responding and showing the firebug inspect tool.</p>
  
  <p>On 17-3-2017 uninstalled and installed the 52 version of firefox and add firebug but it not showing there?</p>
  
  <p>see the screenshot below.</p>
  
  <p><a href="https://i.stack.imgur.com/xLjac.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xLjac.png" alt="enter image description here"></a></p>
  
  <p>The problem is happen only in the version.Anybody have idea.
  <a href="https://i.stack.imgur.com/ovjmk.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ovjmk.png" alt="enter image description here"></a></p>