Consider replacing the device. You can find a used Android 8.1 (Go Edition) phone for under $30 that will run the modern Facebook app safely. However, if you love your Jelly Bean device, follow this guide carefully, and you will continue scrolling your news feed for the foreseeable future.
Look for versions released around 2014 to early 2016 . facebookapk for android 422
If you need to use Facebook on an Android 4.2.2 device, Consider replacing the device