firebug is not showing in firefox

I have found a solution to use firebug [version 2.0.19] in latest version of firefox 53.03

Please follow the steps:

1. In your address bar enter about:config, find
2. browser.tabs.remote.autostart set it false
3. browser.tabs.remote.autostart.1 set it false
4. browser.tabs.remote.autostart.2 set it false
5. Restart the Firefox.