One thing you have to realise is that the cache size is in MB so
larger the number, more files are cached.
My custom setup is 5MB but I could do with only 1MB. There is
absolutely no need to have a larger cache size especially if you
have a fast internet connection and you are not on metered
subscription.
I am sure people would have their own setup but your figures are too
large. Also, you don't need to set this in
About:Config and so
please avoid changing anything in Mozilla setup files. All the
settings are done from Tools/Options UI interface.
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