Browser.cache.memory.capacity |link| Here

: Stores data directly in your RAM. It is extremely fast but volatile, meaning it is cleared whenever the browser or computer restarts.

Web browsers typically use two types of caches: and memory cache . Browser.cache.memory.capacity

: 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. : Stores data directly in your RAM

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 : If you have a computer with limited RAM (e

: 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.