Browser.cache.memory.capacity «PC»

| User Profile | System RAM | Recommended Value | Rationale | | :--- | :--- | :--- | :--- | | | 8 - 16 GB | -1 (Auto) | Firefox's dynamic algorithm is highly optimized for standard usage patterns. | | Developer / Power User | 32 GB | 256000 (250 MB) | Provides headroom for heavy SPAs and dev tools without starving the OS. | | Legacy Hardware | 2 - 4 GB | 25600 (25 MB) or 0 | Prevents cache from causing swapping. Disable if OS memory pressure is extreme. | | Ramdisk User | 64 GB+ | 0 (Disable) | If you mount the Firefox profile folder to a RAMdisk, disable the internal memory cache to avoid double-caching data in RAM. | | Privacy Focused | Any | 0 (Disable) | Disabling the memory cache ensures that closing the browser leaves zero trace of images or scripts in RAM (though disk cache may remain). |

browser.cache.memory.capacity is a Mozilla-based browser (like Firefox, Thunderbird, or Pale Moon) preference that determines the maximum amount of dedicated to caching decoded images, script data, and other web content. Browser.cache.memory.capacity

You will enter a number in . Here is a conversion table: | User Profile | System RAM | Recommended

The keyboard clacked. about:config typed into the address bar. A risky move, the advanced settings. Disable if OS memory pressure is extreme

By default, this preference is typically set to . This "automatic" setting allows the browser to dynamically determine the optimal cache size based on the total physical RAM available on the user's system.