There are some tips about Optimizing Firefox V1.5+:
Firefox is supposed to dynamically realease memory from its RAM cache to other Windows applications as needed. Firefox power users recommend limiting the memory cache using the Configuration Console. This frees up memory for other apps, speeding up everything to a greater or a lesser extent, depending on
your machine and the applications you run. Here’s how the trick works:
Step 1. Type about:config into Firefox’s Address Bar and press Enter.
Step 2. Right-click any row, then click New, Integer. Type or paste the following preference name into the dialog box that appears (this is a hidden preference that doesn’t exist in the Configuration Console until you create it): browser. cache.memory.capacity
Step 3. Click OK, then enter the following integer number into the next dialog box, representing 16 MB of RAM for the cache: 16000
Step 4. Click OK to close the dialog box, then close all instances of
Firefox and restart it.
Move the disk cache to a faster or larger location:
Many Windows users like to locate their disk cachefiles on a separate hard drive from Windows. This can improve the performance of Windows or whatever program is using the cache, or it can free up space on a primary partition. (The disk cache should not be confused with the RAM cache described above.) To move Firefox’s disk cache, use about:config to create a new preference. (This is another hidden preference that doesn’t appear until you create it.)
Type browser.cache.disk.parent_directory into the dialog box that appears, then click OK. In the Value dialog box, enter c:\folder, providing the foldername in which you wish the file to be located.
Speeding up Firefox on Windows XP
You can speed up the loading of Firefox on Windows XP by adding it to the programs that XP “prefetches.”
To do this, right-click the Start Menu item for Firefox, or any icon you use to start Firefox, and open the Properties dialog box. Add a space plus /Prefetch:1 to the command line and click OK. The resulting line might look as follows:
“C:\Program Files\Mozilla Firefox\ firefox.exe” /Prefetch:1
Speeding up the maximizing of Firefox
Step 1. Use about:config to create a new, Boolean value. Type or paste the following string into the dialog box that appears: config.trim_on_minimize
Step 2. Click OK to close the dialog box. Change the value from “true” to “false” and restart Firefox.
Virtual Hard Drive takes a portion of your system memory (RAM) and uses it like a hard disk drive, dramatically increasing read and write times. Applications perform up to 340 time faster, making Virtual Hard Drive the software of choice for anyone looking to reduce the load and response time of calculation-intensive applications.
Creating a RAM disk on you hard disk, Moving Firefox’s cache directory there.
Have fun your Firefox life.
February 3, 2006 at 7:20 am
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February 18, 2006 at 2:24 am
these work great thanks. You should also add the whole memory usage back button ordeal that everyone is talking about latelly.
I generally do not bo back more than 2 pages or I just open up a new tab. So I set
browser.sessionhistory.max_total_viewers = 2 ( -1 by default ) and it looks like firefox is using quite a bit less memory now. This whole thing greatly depends on the user’s browsing habits though. One problem that I still have is that once the Java VM is started it does not close until you exit Firefox compleatelly ( not just the tab that was using it ). If there is a way to fix that through the configs I would love to know about it .
May 23, 2006 at 10:37 am
thanks, used most of the tips including cg0def’s one. Working well with cache on Ram disk too
April 29, 2007 at 8:06 pm
thanks for ur cache settings..its amazing..after my long serch..cheers..
July 1, 2007 at 2:53 pm
For creating the new cache folder, browser.cache.disk.parent_directory, isn’t it a new “string” rather than an “integer” I accidentally created it as an integer and now I can’t get rid of the preference name as an integer.
August 7, 2007 at 6:08 am
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January 8, 2008 at 7:00 am
A WARNING: Setting browser.cache.memory.capacity to 16 MB caused Firefox randomly to close immediately after launch.
February 11, 2008 at 9:32 am
I was think of moving the my Firefox’s cache to a directory-folder which I’ve designated for web related stuff on a disk drive other than “C,” but when I put “about.config” into the address bar, Firefox looks for “http://about.config,” (and doesn’t find it, for there is not such url with a web page.) What to do?
February 12, 2008 at 1:25 am
Ted, you need to use a colon, not a dot.
about:config
March 16, 2008 at 1:54 pm
If you move the cache using about:config, make sure you call it a “string” not an “integer” as related in the initial post. Calling it an integer will result in an errant entry that is extremely difficult to correct. I found out the hard way. Still trying to fix.
March 16, 2008 at 2:30 pm
Found a solution. Type “about:config” in the browser window. Highlight the preference entry with the error, in this case “browser.cache.disk.parent_directory.” Right click, left click reset. The value should be empty. Close all browser windows. Then open new browser window. Type “about:config” again. The errant preference should me deleted as no value existed. Highlight any preference. Right click, cursor on New, left click String. Type in the preference desired, e.g., “browser.cache.disk.parent_directory.” Click OK. Next will prompt for value; type “X:\xxxx.” It is best to type some file rather than a root directory alone. Eureka! Worked for me. It was bad enough the original poster did not double-check the advice given, but to be so lazy as to let the error continue speaks volumes about character. The Mozilla forum has numerous articles for extensions and help, though this fix was not listed anywhere. Just got lucky.
April 2, 2008 at 7:33 pm
“… move the cache using about:config, make sure you call it a “string” not an “integer” … ”
Or just: close FireFox; go to FireFox profile directory (normally something like c:\Documents and Settings\[UserName]\Application Data\Mozilla\FireFox\Profiles\[ProfileName]\); open in editor prefs.js file; locate the line with the option and delete it. Save file and start FireFox.
April 7, 2008 at 10:29 pm
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May 1, 2008 at 6:38 am
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June 25, 2008 at 7:35 am
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June 27, 2008 at 3:55 am
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December 22, 2008 at 2:26 pm
i have done as u said but when i am using mozilla there were no temporary files created in that folder where i located the new cache dir. please help me.
July 23, 2010 at 10:14 am
Make sure you set correct property as a STRING value, eg, it must be named:
browser.cache.disk.parent_directory
Then specify the location, eg:
Z:\temp
Hope that helps.
September 21, 2010 at 6:02 pm
thanks!
July 10, 2011 at 12:06 am
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August 12, 2011 at 1:24 pm
The new Firefox 5 was supposed to fix memory leaks, & other bugs causing FF to have huge memory usage. It still didn’t decrease. I found an application called foxBoost, which really cuts down memory usage, but at the cost of increased CPU usage. It’s a trade-off, but it works.
November 13, 2011 at 2:08 am
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