У вашего броузера проблема в совместимости с HTML5
Firefox OS 2.0 flashing to the Geeksphone Peak developer preview.
--- How to flash the image file?
Step 1.: Download the firmware package. Go to http://downloads.geeksphone.com/ select your device and the OS version what you want. When the download finished, extract the archive.
Step 2.: Open a console window in the extracted firmware's directory.
Step 3.: Connect your GeeksPhone device to the PC with USB cable. You can check it with "./adb devices" command (without the quotes).
Step 4.: Run the following command in the console: "sudo ./flash.sh" (on linux) OR "./flash.bat" (on windows). When the firmware flashing finished, the phone will reboot itself. Do not interrupt the flashing process, it can brick your mobile phone.