Browser.cache.memory.capacity !!better!! Jun 2026

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:

Increasing this value can make "Back" and "Forward" navigation feel near-instant, as pages are kept in RAM rather than being re-fetched from the disk. 5. Troubleshooting If you search for the preference and it does not appear , you can create it: Right-click anywhere on the about:config browser.cache.memory.capacity Enter your desired value (e.g., for auto). , such as disabling the disk cache or managing multi-process (e10s) Browser.cache.memory.capacity

Firefox will display a warning: "This might void your warranty!" Click "Accept the Risk and Continue." If you have a specific reason to limit

: Set this boolean preference to false if you want to completely turn off RAM caching without changing capacity numbers. Troubleshooting If you search for the preference and

Type browser.cache.memory.capacity into the search bar at the top of the page.

Recommended for systems with 16 GB+ RAM. Keeps massive amounts of data in memory.

In the search bar at the top of the page, type or paste browser.cache.memory.capacity . Edit the Value: