Yes. Memory cache and disk cache ( browser.cache.disk.capacity ) are separate.
: Most users leave this at -1 , which tells Firefox to use a dynamic heuristic . It looks at how much total RAM you have and grabs a slice (usually between 4MB and 32MB for older systems, but much more on modern rigs) to keep images and scripts ready for an instant "Back" button click. Browser.cache.memory.capacity
If you have a specific reason to limit or increase memory usage (such as running on a system with very low RAM), use these common values: (Very low-end systems) (Standard limit for low RAM) (Smooth browsing for older PCs) (Power users with 16GB+ RAM who want maximum speed) 4. Why You Might Change This High Memory Usage: It looks at how much total RAM you