Today, Mozilla announced in a blog post that it is brining Firefox for Android to million more Android devices out there. Until today, Firefox for Android was only supported by Android devices running Android 2.2+ and using an ARM v7 based processors.
However, beginning from today, Firefox for Android will be available to all Android 2.2+ devices that are powered by an ARM v6 processor. This includes quite a lot of popular low-end Android devices like the GAlaxy Ace, Motorola Fire XT, HTC ChaCha and more.
According to Mozilla, more than half of the 500 million Android phones out there are powered by an ARM v6 processor, so this move from Mozilla will definitely help in increasing the user base of the app. However, your Android device needs to have at least an ARMv6 processor that is clocked at 800MHz, along with a minimum of 512MB RAM.
The latest release of Firefox for Android also adds support for hardware and software decoder for h.264 videos on Android 4/4.1, along with initial web app support. The full release notes of the latest release can be found here, while the latest version can be downloaded from here.