config.trim_on_minimize = true : Free RAM when Firefox is Minimized!

@thebigk • Oct 22, 2024

Oct 22, 2024

1.2K

Alright,

I found this comment on lifehacker. Someone commented that if we set

config.trim_on_minimize = true

Firefox will return system's precious RAM. Anyone's got more information on this?

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silverscorpion

@silverscorpion-iJKtdQ • Feb 26, 2009

config.trim_on_minimize??

There is no such field in my firefox, in the about:config page. I'm using firefox 3.1. Is it working for anyone??
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shalini_goel14

@shalini-goel14-ASmC2J • Feb 26, 2009

silverscorpion
config.trim_on_minimize??

There is no such field in my firefox, in the about:config page. I'm using firefox 3.1. Is it working for anyone??
Scorpion right click there and then add new entry of boolean type and set its value to true. If it is not working try making a user.js file(add entry to it) in pref folder of firefox. I tried but it was showing access denied to me.

PS: I will try more and will get back to you but you also try if it works and let us know. 😀
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shalini_goel14

@shalini-goel14-ASmC2J • Feb 26, 2009

Wow man, its magic 😁

Add following entry in all.js file in greprefs folder of firefox3 version and save it.

pref("config.trim_on_minimize", true);
When I minimize the window. it is giving quite a bigger amount reduction in RAM consumption.

See just now my Task manager is showing 28,596K against firefox.exe
and when i minimized it, it showed around 3452k. Though it will keep on varying.

I must say a very good information told.😁
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shalini_goel14

@shalini-goel14-ASmC2J • Feb 26, 2009

But I have a question regarding this- if anyone of you know the reason Please tell 😀

When I made the same changes in my laptop - firefox 3 it didn't allow me to modify all.js file(saying "Access is denied") but just now I tried it in my office system (same version), it is working 😕 How?

Is the directory path matters?

Any ideas anyone?
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ms_cs

@ms-cs-Ab8svl • Feb 28, 2009

It is not working for me..I am using firefox 3.07
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ms_cs

@ms-cs-Ab8svl • Feb 28, 2009

A very Useful information this.Also anybody Explain the working of this trick...
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shalini_goel14

@shalini-goel14-ASmC2J • Feb 28, 2009

ms_cs
It is not working for me..I am using firefox 3.07
ms_cs, Did you try the way I told in my post? Are you sure it is not working? Are you getting "Access is denied" Problem? If any other problem let us know? 😀

Try this Add following entry in all.js file in greprefs folder of firefox3 version and save it.

pref("config.trim_on_minimize", true);

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ms_cs

@ms-cs-Ab8svl • Feb 28, 2009

Amazing...Its really freeing the ram...May I know the working of this?
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Kaustubh Katdare

@thebigk • Feb 28, 2009

Access denied? Maybe you've your firefox running? Do you get the same error when you try to edit the file when FF is closed?
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Kaustubh Katdare

@thebigk • Feb 28, 2009

Here's more information: <a href="https://kb.mozillazine.org/Config.trim_on_minimize" target="_blank" rel="noopener noreferrer">Config.trim on minimize - MozillaZine Knowledge Base</a>

It says that you should leave it to 'false' to maintain application responsiveness. Anyone's seen delayed response time when the setting is 'true' and FF is maximized (from the tray)?

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ms_cs

@ms-cs-Ab8svl • Feb 28, 2009

I did not even get a single error.In the last time login in my system, i was modified that file.At that time it was not working.when i attempted to restart my system, I got the thing.It is now really working.
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shalini_goel14

@shalini-goel14-ASmC2J • Feb 28, 2009

The_Big_K
Access denied? Maybe you've your firefox running? Do you get the same error when you try to edit the file when FF is closed?
Man, My firefox was already closed while changing the file. See the error message which I am still getting. I gues it may be beacuse of location? Has anyone tried to the change file in following location? 😔

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Kaustubh Katdare

@thebigk • Feb 28, 2009

Run 'Notepad' in Admin Mode. [I posted procedure to do so few months ago, please search]
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shalini_goel14

@shalini-goel14-ASmC2J • Feb 28, 2009

The_Big_K
Run 'Notepad' in Admin Mode. [I posted procedure to do so few months ago, please search]
Well everything I do on my system is in Admin mode for me. I don't know which Admin mode you are talking about. Just now I tried installing firefox again in C:\ location instead of C:\Program Files , now it allowed me to change that file though I could not see magic of this statement anymore 😔

Following is the link that you are talking about and have posted almost a year back(not months back 😉) 😀
#-Link-Snipped-#

Thanks for the information. Good link 😀

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Kaustubh Katdare

@thebigk • Feb 28, 2009

Here it is -

Follow these steps:-

1. Click on Start Button
2. Rt. click on 'Notepad'
3. Click "Run As Administrator"
4. Click "Continue" on the prompt
5. Navigate to C:\Windows\System32\drivers\etc\ using Notepad's 'Open' location option.
6. Select 'all files' and then choose the 'hosts' file. Make necessary changes and save!
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cpusrvc

@cpusrvc-i7JhX3 • Jun 11, 2009

I have been playing with this today. FF is open, and Task Manager running and set to "on top". Processes list shows FF is using 130k mem, 251 VM. Minimize FF, mem drops to 18k, VM is same. Over the next minute or two, not touching the computer, mem slowly creeps up to 118k, VM is same.

It seems like the setting must clear out work space memory, and then immediately starts to fill it again as FF does it's thing. I guess this setting isn't much of a help.
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