User Agent: Mozilla/5.0 (Linux; Android 4.4.2; D6503 Build/17.1.1.A.0.402) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.141 Mobile Safari/537.36 Steps to reproduce: Use VPN. Firefox still works. Turn off VPN, Firefox cannot connect to any website. The VPN is f5 edge client. All other app including chrome browser work well. Actual results: Firefox cannot connect to any website

What happens if you close Firefox and then re-open it? Which version of Android is this? Which version of Firefox are you using? When you say 'Turn off VPN, Firefox cannot connect to any website.' what do you see when you attempt to load a website in Firefox?

It's Android 4.4.2 on Sony Xperia X2 . and it's Firefox v30. It doesn't help if I close Firefox. But interestingly, if I reconnect VPN, the connection comes back. Disconnect again, Firefox die again. All the other app and chrome show nothing wrong in these steps. The is a thin orange progress bar below the address bar. It will run to around 20% of its full length and stops . Later on it jumps to "server not found" page.

I've uploaded a screen shot. Firefox just freezes like this. Nothing happens. If I switch to other app and come back later, it jump to the "problem loading page" page.

Hi, Could you explain more on this "tracking-fennec: --- " thing? Thanks