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Is it better to set the web content cache limit high or low?

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I have the web content cache limit set at 600 Mb, and when it reaches that limit my computer seems to run slower until I clear it. Does it matter what I set the limit to? If I set it lower will i just have clear it more often?

I have the web content cache limit set at 600 Mb, and when it reaches that limit my computer seems to run slower until I clear it. Does it matter what I set the limit to? If I set it lower will i just have clear it more often?

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Low cache - quick answers, few data stored High cache - many stored data, delay in response

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It is best to leave managing the cache to Firefox and use the default settings.
Firefox should automatically remove items once the cache gets full to make room for new items.

Tools > Options > Advanced > Network: Cached Web Content: [] "Override automatic cache management"