This module provides a small "caching" extension to the Juicebox HTML5 Responsive Image Galleries module that allows the XML-based configuration for each gallery to be delivered via a local caching mechanism instead of being built in isolation. It's primary purpose is to bypass limitations introduced by 3rd party modules that don't deal with fields in a native way (such as Panel Nodes). More technical details are listed below but put very simply you probably want to try this module if you see a warning like the following while configuring a Juicebox gallery:
You appear to be using the Juicebox field formatter with a field instance that is not directly attached to an entity. This configuration is not officially supported and will likely not work as expected.