If you have followed my advice on your browser of choice, you might have noticed that after running a while, FireFox gets a little RAM hungry. I found a tweak you can do to improve performance and reclaim some of the memory it eats voraciously.
I found this little tidbit in a number of places across the web when I went looking for a solution, but will credit the original author and his site. You can click the link in the source box below the article to see any updates he might have posted.
Now, this is by no means a REAL fix for the Firefox memory leak, but it certainly does appear to help it quite a bit. This little fix will move Firefox to your hard drive when you minimize it, and as a result it will take up less than 10MB of memory while minimized. So far, from my experiences with using this today, when you maximize Firefox it will obviously increase the memory usage. However, it does not seem to go back up to the insane amount that it was at before minimizing it. For example, Firefox was at 180MB of memory usage and then I minimized it and after a few seconds I maximized it. After maximizing it and continuing on my routine business it appeared to only have gone up to 60MB. This seems to be a good solution for me right now since I frequently maximize and minimize Firefox anyways.
Now I know many people will say that Firefox will take longer to maximize since it will be located on the hard drive, but I haven’t noticed ANY delays. It is able to redraw itself just as quickly as if it was located in the ram (in my experience). Okay, now here are the few simple steps:
- Open Firefox and go to the Address Bar. Type in about:config and then press Enter.
- Right Click in the page and select New -> Boolean.
- In the box that pops up enter config.trim_on_minimize. Press Enter.
- Now select True and then press Enter.
- Restart Firefox.
See how quick and painless that was? At any rate you can always go back and delete the same setting that you just created if you start to experience any issues.
I have also set the browser.sessionhistory.max_total_viewers value to 0 because that will prevent Firefox from caching pages for the back button. This is also supposed to free up some memory that gets stolen.
Source: CyberNet: This May Help Your Firefox Memory Leak
About The Author

Cenay Nailor is an Online Marketing and Blogging coach with mad technical skills she loves sharing with Videos. Visit her video tutorial blog and get some technical help. You should also snag the weekly injection of Tech-Based Marketing Newsletter, and have it sent right to your inbox. (Upper right corner)
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- Cenay Nailor - Fix The Dreaded Memory Leak In FireFox -Teaching You Online Marketing http://bit.ly/H78ap

















Wow, thanks to all for sharing the post. I really hope it helped you as much as it helped me!
I went from averaging about 1.5 gig in memory, to roughly 300 meg when 20 tabs open. Minimize and it drops radically!
Thanks again for the Tweet’s tweeple.
I guess I am a little surprised at how many people needed to know about FireFox. I guess its time to consider a power FireFox session to discover all the little tweaks that make browsing with FireFox so much easier.
Cenay,
This was a great education for me. I was wondering why my computer was running so slow and locking up on me. It behaved rather strangely. I noticed that after rebooting it runs much faster, I know i had Firefox running in multiple windows, since last night. I just did the change you suggested and I am looking forward to seeing a difference. I will spread the word in my circles! Thanks!