How to Stop Mozilla Firefox From Consuming CPU Cycles? Open Firefox Browser on your computer. Type about:config in the address bar. Read the statement and click ‘I’ll be careful, I promise!’ button. Type “browser.cache.disk.capacity” in the search bar. Double click on the line and then modify the value to 16384. Now press Control, alt and delete key on your keyboard. CPU Usage for Firefox should now stay nominally under 20%. This is How you can stop firefox from consuming cpu cycles.

How to Stop Mozilla Firefox From Consuming CPU Cycles

15 thoughts on “How to Stop Mozilla Firefox From Consuming CPU Cycles

  • December 23, 2014 at 11:21 pm
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    Thank you!

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  • August 11, 2015 at 10:39 am
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    When I changed this value it reverted to its original by itself in few seconds even before restarting the browser. Then what I found out is that there is another entry called "browser.cache.disk.smart_size.enabled" , I think this thing was added later versions. Change its value to False. Then the capacity will stay 16384.
    And, anyway this doesn't do anything. when I play youtube videos the cpu is high. the cpu usage goes down even when I pause the youtube video.

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  • June 8, 2016 at 6:17 am
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    thanq so much
    its working

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  • July 21, 2016 at 10:40 pm
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    same

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  • March 14, 2017 at 10:15 pm
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    No workie – just sets itself back to the default 358400 in a few minutes.

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  • April 3, 2017 at 1:59 am
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    its working good tq so much

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  • May 26, 2017 at 10:55 pm
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    TNX! Works fine for me!

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  • September 12, 2017 at 11:25 pm
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    Firefox stuck in safe mode and can't get back to original version, I'm using win10 I click menu and help is not there to get to trouble shoot?

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  • November 23, 2017 at 3:24 pm
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    Nope.

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  • July 30, 2018 at 3:13 pm
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    will this slow mozila

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  • August 14, 2018 at 6:54 pm
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    If you go to about:config and set "browser.cache.disk.smart_size.enabled" to false first, then your settings will stay at 16384

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  • November 2, 2018 at 1:45 am
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    thanks it worked my firefox cpu usage went from 30% to anywhere under 2%

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  • April 13, 2019 at 7:44 am
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    did this but did not help at all 🙁

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