How to let firefox ocuppy lower memory

Posted on March 27, 2009

As a FF users,sometime we may find the Firefox cause our computer slow,in fact most times it’s because Firefox ocuppy more memory at this time.So if there is any way to give out a limit memory for firefox,of course,below will show you the steps to do the job.

1.In your firefox’s address bar,input “about:config” then press “Enter”

ffaboutconfig

2.Scroll down to find item “browser.cache.memory.enable“  to make sure it’s value is true,if not please double-click this item to make it as true

ffmem2

3.Right-click anywhere  in the about:config window and select New and then Integer from the pop-up menu

ffnewitem

4.Enter browser.cache.memory.capacity in the New integer value pop-up box,then click OK

ffnewentry

5.Now you need to enter a value in the Enter integer value window,the value depends on your memory and it’s unit is KB ,and it indicates the maximum amount of memory in KB to use to cache decoded images.

Tips:Too lower value will save your memory but may make your FF run slow

ff102401

Here I use 20480KB(24M) memory for image decoding,and my RAM is 256M.

6.If for any reason you wish to restore the default settings, change the browser.cache.memory.capacity integer value to -1 ,  which will let firefox use the default vaule.Chart below is the default value of Firefox 1.5 of this preference

Physical RAM Memory Cache (in KB)
32 MB 2048
64 MB 4096
128 MB 8192
256 MB 14336
512 MB 22528
1 GB 32768
2 GB 45056
4 GB 59392
8 GB 75776

7.Restart your Firefox to see the results.

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