Browser.cache.memory.capacity ✔
In the architecture of modern web browsers, specifically within the Gecko engine (Firefox), browser.cache.memory.capacity
- Maximum storage size – shows your set value
- Storage usage – current usage
Recommended Values
| Value | Meaning |
|-------|---------|
| -1 | Default (recommended). Firefox automatically manages the cache. |
| 0 | Disabled. No memory caching. Drastically slows down session navigation. |
| 65536 (64 MB) | Conservative fixed limit. |
| 131072 (128 MB) | Moderate fixed limit. |
| 262144 (256 MB) | High fixed limit (rarely needed). | Browser.cache.memory.capacity
How to modify the value
What is browser.cache.memory.capacity?
To fully master Firefox's cache behavior, you should also be aware of these sibling preferences: In the architecture of modern web browsers, specifically
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: Maximum storage size – shows your set value