It looks like you're looking for information on a "facebook.jar" file, specifically a version optimized for mobile devices with a 240x320 resolution
While modern smartphones use sophisticated APIs, J2ME apps were severely limited by hardware. A "Facebook Jar 240x320" typically offers: facebookjar 240x320 new
If you have an old Sony Ericsson in a drawer, charge it up. Somewhere on that memory stick is a folder named "Applications." Inside, the ghost of your youth is still waiting for a GPRS signal. It looks like you're looking for information on a "facebook