Samsung galaxy mini,GT-S5570 Gingerbread-2.3.6,Armv6 device last month you make firefox browser for lower end device,normally i was installed & run compatiable on device.but after updating google play store 4.0.26 it shows -"your device is not compatiable with this app" before updating google play store it normally compatiable & easy installed on my device. So cant update firefox browser using play store because of compatiable notice,but firefox was normally installed & work fine in my device.