Default [Q] Firefox OS Problems with RECOVERY

I have a Nexus S and currently have Firefox OS running (Boot2Gecko 1.1.0hd-prerelease), I am having the following problems

1. Can't update the OS from the Check for Updates option in Settings. It always fails when I check for updates with a message that says "There was an Error Checking for Updates"

2. If I reboot my phone into the bootloader and select recovery, I get a picture of the android logo with a Red Triangle with an Exclamation mark. The phone shows this logo and reboots by itself into Firefox

I need help in removing Firefox and getting back to Android.

Please help me