In this article, you will see how to configure the size of the cache in Mozilla Firefox. A larger cache implies that a larger amount of offline data can be stored, which will help Firefox to load certain webpages more rapidly!
What is the default cache size in Firefox?
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The default value of Firefox's cache is 50 MB.
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The minimum value is 0.
- The maximum value is 1024 MB.
To change the size of the cache, there are two possible methods.
Note: If your PC is equipped with a SSD, it is not advisable to increase this value!
How to set the maximum cache size?
- Open Firefox.
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Click on the Menu button > Options.
- Click the "Advanced" > "Network" tab.
- Tick the Override automatic cache management checkbox.
- Edit the value for Limit cache to [] MB of space (between 50Mb and a maximum of 1024MB).

- Click on Ok to validate and restart Firefox.
Is there an other method?
- Open Firefox
- Type about:config in the address bar and press Enter.
- Firefox will display a security warning, click on I'll be careful, I promise!
- Search for the browser.cache.disk.capacity preference, which determines the maximum cache size.
- Double-click to edit (Integer value)
- Increment the value to your convenience (default value 50000, which represent 50 MB)
Do you need more help with Mozilla Firefox? Check out our forum!
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FireFox help
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Mozilla Firefox
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