Hi kieranmulhall, The best way to get your request to the Developers would be to [http://input.mozilla.com/en-US/feedback leave feedback through the official channels]. This will help the developers to make the product better and better.

Bug 697205 - (armv6) Get ARMv6 builds working again

Bug 701708 - Sort out STLport arm vs. thumb issues for armv6 builds

Sorry but it is not mobile Firefox that supports a particular phone or tablet but whether that device has a '''ARMv7''' type of cpu, Android 2.1+ and 512+MB Ram. The Samsung GT-S5570 is a entry-level smartphone as it has a slow 600 MHz Qualcomm MSM7227 cpu which is a older ARMv6 type. The good news is that Mozilla is looking at trying to see if they can get mobile Firefox builds working on ARMv6 devices (if they have decent enough specs). The experimental ARMv6 builds of mobile Firefox before were larger, slower and had stability problems that do not exist on ARMv7 devices. The ARMv6 also does not support the Thumb-2 instruction set as it is a feature of ARMv7 processors which makes the code both smaller and faster. For reading as Bugzilla is not a discussion forum. ([https://bugzilla.mozilla.org/page.cgi?id=etiquette.html Bugzilla etiquette]) [https://bugzilla.mozilla.org/show_bug.cgi?id=697205 Bug 697205] - (armv6) Get ARMv6 builds working again This one attached to Bug 697205 shows some of the difficulty in supporting ARMv6. [https://bugzilla.mozilla.org/show_bug.cgi?id=701708 Bug 701708] - Sort out STLport arm vs. thumb issues for armv6 builds