To optimize Firestorm, you need to remember to clean your cache periodically. The more frequently, longer times, travelling, hypergridding, or building activities.  You spend in the virtual world, the more often you need to do this. There are two ways to do this: From the viewer (partial clear) or from the root directory in the File Manager (hard clear). 

PARTIAL CACHE CLEAR: IN THE VIEWER

HARD CLEAR YOUR CACHE: FROM THE FILE MANAGER

You want to clear the files on your hard drive so that the cache folder is empty. You want to do this if you are doing a great deal of building, scripting, hypergridding, or you are having issues that persist after you partially clear your cache in the viewer.