In the past, Firefox was available on Android devices running on a variety of versions, including 4.2.2. However, as Android and Firefox continued to evolve, compatibility issues and security concerns led to the discontinuation of support for older versions of Android.

Released in February 2013, Android 4.2.2 was a minor update to the Jelly Bean version of the Android operating system. It brought several bug fixes, security patches, and performance improvements to devices. Although it was a relatively stable and feature-rich version of Android, it has since been succeeded by numerous other versions, including KitKat, Lollipop, Marshmallow, and so on.

In general, it's recommended to use a newer version of Android and a compatible web browser to ensure a secure and smooth browsing experience. If you're still using an Android device running on 4.2.2, consider upgrading to a newer version of Android or exploring alternative devices.

While it's possible to run Firefox APK on an Android device running on 4.2.2, it's essential to be aware of the potential challenges and limitations. If you do decide to install Firefox APK on your device, make sure to take necessary precautions, such as enabling security features and keeping your browser up-to-date.