: If you have 16GB or more of RAM, increasing this capacity can speed up "Back" and "Forward" navigation by keeping more web elements ready in the fastest possible storage.
: Some users disable the disk cache entirely and force everything into memory to ensure no browsing data is written to their physical drive. How to Configure browser.cache.memory.capacity
: Type browser.cache.memory.capacity into the filter box.
: Stores data on your hard drive or SSD. It is persistent but relatively slow to access.
: If you have a computer with limited RAM (e.g., 2GB or less), capping this value can prevent the browser from "hogging" memory and slowing down other applications.
While modern browsers are excellent at managing memory on their own, understanding browser.cache.memory.capacity empowers you to optimize your browsing experience to match your specific hardware and privacy needs. Firefox/Tweaks - ArchWiki
: Automatically determines the cache size as a percentage of your physical RAM. 0 : Disables the memory cache entirely.
To get the most out of your memory cache, ensure the following related preferences are also set correctly in about:config :
