Browser.cache.memory.capacity _hot_ -

: 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.

To get the most out of your memory cache, ensure the following related preferences are also set correctly in about:config : Browser.cache.memory.capacity

Most users never need to touch this setting because modern Firefox versions (v4.0+) use dynamic cache sizing based on your available system resources. However, manually adjusting it can be beneficial in several scenarios: : If you have 16GB or more of

: Set to false if you want to bypass the slower disk cache entirely and rely only on RAM. Browser.cache.memory.capacity

Historically, the MozillaZine community suggested these starting points for older hardware: Physical RAM Suggested Cache Value (KB) -1 (Automatic) Related Settings for Better Performance

: 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

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