Why mozilla firefox log many messages from socket.io 1.2.1

Question

I implement socket.io 1.2.1 server script on a Centos server, and open a client window on mozilla firefox (v34.0.5). I see many logs in my firebug console. please see https://dl.dropboxusercontent.com/u/58691844/firebug%20logs.PNG

when I copy the socket.io server script to my localhost and run it, and open a client window, I dont see any logs in my firebug.

Answer 1

socket.io uses the debug module for its output. In node this means you toggle debug output via an environment variable called DEBUG. In the browser however, debug output is toggled by setting localStorage.debug. If you open up the console and do console.log(localStorage.debug); you should see it output some non-empty string. If you set it to a blank string, the debug output should go away.