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March 2, 2009 // 8:28 am - Below are a few Firefox performance hacks, tweaks, and productivity enhancements that can be made via the About:config of Firefox.

To quote: Make Firefox Give Back RAM When Minimized
To enable the setting so that Firefox gives back RAM, do the following:

1) In the Firefox address bar type: about:config and then hit Enter.
2) In the "Filter" search, type: config.trim_on_minimize
3) Right click on the setting and click "toggle" so that the Value turns to "true".

After performing the above, you will need to restart the browser and Firefox will now "give back RAM" when minimized. To undo the change, perform the steps again but make sure the value turns to "false".

Check out the rest linked above!

Note: Article shortened per request from Keith Glines (IP: on May 24, 2009.

The 12 Best Firefox About: Config Performance Tweaks

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#5 - Sarge187 - March 5, 2009 // 2:20 am
Sarge187's Avatar
Can't seem to find the ram one, shame.

#4 - wsc - March 5, 2009 // 1:10 am
wsc's Avatar
thank you. looking forward to these tweaks!

#3 - dajedimaster - March 5, 2009 // 1:05 am
dajedimaster's Avatar
thanks, this will come in handy

#2 - saviour07 - March 3, 2009 // 6:28 pm
saviour07's Avatar
i think the ram one is the most useful, especially if your like me and open up like a million tabs only to see your memory gradually building up in task man lol

#1 - Tsusai - March 2, 2009 // 9:56 am
Tsusai's Avatar
"Make Firefox Give Back RAM When Minimized" & "Hacking Firefox Network Settings for Performance"